diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
new file mode 100644
index 0000000..12ea855
--- /dev/null
+++ b/.github/workflows/main.yml
@@ -0,0 +1,27 @@
+name: Ruby
+
+on:
+  push:
+    branches:
+      - master
+
+  pull_request:
+
+jobs:
+  build:
+    runs-on: ubuntu-latest
+    name: Ruby ${{ matrix.ruby }}
+    strategy:
+      matrix:
+        ruby:
+          - '3.3.5'
+
+    steps:
+    - uses: actions/checkout@v4
+    - name: Set up Ruby
+      uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{ matrix.ruby }}
+        bundler-cache: true
+    - name: Run the default task
+      run: bundle exec rake
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..3fe11ee
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,10 @@
+/.bundle/
+/.yardoc
+/_yardoc/
+/coverage/
+/doc/
+/pkg/
+/spec/reports/
+/tmp/
+.idea
+Gemfile.lock
\ No newline at end of file
diff --git a/.idea/.gitignore b/.idea/.gitignore
new file mode 100644
index 0000000..13566b8
--- /dev/null
+++ b/.idea/.gitignore
@@ -0,0 +1,8 @@
+# Default ignored files
+/shelf/
+/workspace.xml
+# Editor-based HTTP Client requests
+/httpRequests/
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
diff --git a/.rubocop.yml b/.rubocop.yml
new file mode 100644
index 0000000..be08bf8
--- /dev/null
+++ b/.rubocop.yml
@@ -0,0 +1,55 @@
+AllCops:
+  TargetRubyVersion: 3.3
+
+Style/StringLiterals:
+  EnforcedStyle: double_quotes
+
+Style/StringLiteralsInInterpolation:
+  EnforcedStyle: double_quotes
+
+Style/FormatStringToken:
+  EnforcedStyle: template
+
+## Settings below are meant to be enabled (at least some of them)
+## but in order to make rubocop useful first for correcting obvious things,
+## they were disabled for the time being. TODO: review
+
+Style/Documentation:
+  Enabled: false
+
+Metrics/MethodLength:
+  Enabled: false
+
+Metrics/AbcSize:
+  Enabled: false
+
+Metrics/ClassLength:
+  Enabled: false
+
+Metrics/PerceivedComplexity:
+  Enabled: false
+
+Metrics/CyclomaticComplexity:
+  Enabled: false
+
+Naming/MethodParameterName:
+  Enabled: false
+
+Layout/LineLength:
+  Enabled: false
+
+Metrics/BlockLength:
+  Enabled: false
+
+Naming/HeredocDelimiterNaming:
+  Enabled: false
+
+Style/IfUnlessModifier:
+  Enabled: false
+
+Style/ClassVars:
+  Enabled: false
+
+Style/MultilineBlockChain:
+  Enabled: false
+
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..78d409e
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+## [Unreleased]
+
+## [0.1.0] - 2024-10-04
+
+- Initial release
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..cfdec65
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,5 @@
+FROM fedora:41 AS pgpm-rpm
+
+RUN dnf -y install rpmlint ruby ruby-devel mock git gcc zlib-devel
+VOLUME /pgpm
+WORKDIR /pgpm
\ No newline at end of file
diff --git a/Gemfile b/Gemfile
new file mode 100644
index 0000000..7299dc2
--- /dev/null
+++ b/Gemfile
@@ -0,0 +1,16 @@
+# frozen_string_literal: true
+
+source "https://rubygems.org"
+
+# Specify your gem's dependencies in pgpm.gemspec
+gemspec
+
+gem "rake", "~> 13.0"
+
+gem "minitest", "~> 5.16"
+
+gem "rubocop", "~> 1.21"
+
+gem "debug", "~> 1.9"
+
+gem "rbs", "~> 3.6"
diff --git a/LICENSE.txt b/LICENSE.txt
new file mode 100644
index 0000000..97f90f7
--- /dev/null
+++ b/LICENSE.txt
@@ -0,0 +1,21 @@
+The MIT License (MIT)
+
+Copyright (c) 2024 Yurii Rashkovskii
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+THE SOFTWARE.
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..f2b7f20
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+# Postgres Package Manager
\ No newline at end of file
diff --git a/Rakefile b/Rakefile
new file mode 100644
index 0000000..2bf771f
--- /dev/null
+++ b/Rakefile
@@ -0,0 +1,12 @@
+# frozen_string_literal: true
+
+require "bundler/gem_tasks"
+require "minitest/test_task"
+
+Minitest::TestTask.create
+
+require "rubocop/rake_task"
+
+RuboCop::RakeTask.new
+
+task default: %i[test rubocop]
diff --git a/bin/console b/bin/console
new file mode 100755
index 0000000..1225868
--- /dev/null
+++ b/bin/console
@@ -0,0 +1,11 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "bundler/setup"
+require "pgpm"
+
+# You can add fixtures and/or initialization code here to make experimenting
+# with your gem easier. You can also use a different console, if you like.
+
+require "irb"
+IRB.start(__FILE__)
diff --git a/bin/setup b/bin/setup
new file mode 100755
index 0000000..dce67d8
--- /dev/null
+++ b/bin/setup
@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -euo pipefail
+IFS=$'\n\t'
+set -vx
+
+bundle install
+
+# Do any other automated setup that you need to do here
diff --git a/exe/pgpm b/exe/pgpm
new file mode 100755
index 0000000..7cc1dde
--- /dev/null
+++ b/exe/pgpm
@@ -0,0 +1,88 @@
+#!/usr/bin/env ruby
+# frozen_string_literal: true
+
+require "bundler/setup"
+require "pgpm"
+require "dry/cli"
+require "parallel"
+
+module Pgpm
+  module CLI
+    module Commands
+      extend Dry::CLI::Registry
+
+      class Version < Dry::CLI::Command
+        desc "Print version"
+
+        def call(*)
+          puts Pgpm::VERSION
+        end
+      end
+
+      class Build < Dry::CLI::Command
+        desc "Build packages"
+
+        option :os, type: :string, default: Pgpm::OS.auto_detect.name, desc: "OS name"
+        argument :packages, type: :array, required: true, desc: "Package names"
+
+        def call(packages:, args: nil, os: nil)
+          _ = args
+          _ = os
+
+          # puts "There is no build support for OS distribution `#{os}`"
+          # exit(1)
+          pkgs = Parallel.flat_map(packages) do |package|
+            name, version = package.split("@")
+            version ||= :latest
+            p = Pgpm::Package[name]
+            if p.nil?
+              puts "Package #{name} not found"
+              exit(1)
+            end
+            pkg = p[version]
+            if pkg.nil?
+              puts "Package #{name} with version #{version} not found"
+              exit(1)
+            end
+            pkg
+          end
+          b = pkgs.reduce(nil) do |c, p|
+            spec = p.to_rpm_spec
+            builder = Pgpm::RPM::Builder.new(spec, os: Pgpm::OS::RockyEPEL9.new)
+            src_builder = builder.source_builder
+            p = c.nil? ? src_builder : c.and_then(src_builder)
+            p.and_then(builder.versionless_builder)
+          end
+
+          srpms = b.call
+          puts "============="
+          pp srpms
+          puts "============= "
+          Pgpm::RPM::Builder.builder(srpms, os: Pgpm::OS::RockyEPEL9.new).call
+        end
+      end
+
+      class Search < Dry::CLI::Command
+        argument :query, type: :string, default: ".*", desc: "Search query"
+
+        def call(query:, args: nil)
+          _ = args
+          query_regexp = Regexp.new(query, "i")
+          Parallel.filter_map(Pgpm::Package) do |p|
+            matches = p.all_searchable_texts.any? do |t|
+              t =~ query_regexp
+            end
+            "#{p.package_name}: #{p.description}" if matches
+          end.each { |l| puts l }
+        end
+      end
+
+      register "version", Version, aliases: ["v", "-v", "--version"]
+      register "build", Build
+      register "search", Search
+    end
+  end
+end
+
+Pgpm.load_packages(File.join(Dir.pwd, "packages"))
+Dry::CLI.new(Pgpm::CLI::Commands).call
diff --git a/lib/pgpm.rb b/lib/pgpm.rb
new file mode 100644
index 0000000..ff4cfe7
--- /dev/null
+++ b/lib/pgpm.rb
@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require "zeitwerk"
+require "pathname"
+
+class CustomInflector < Zeitwerk::GemInflector
+  def camelize(basename, _abspath)
+    # Specify your custom logic here
+    # This tells Zeitwerk that 'rpm' should be 'RPM' and 'os' should be 'OS'
+    case basename
+    when "rpm"
+      "RPM"
+    when "os"
+      "OS"
+    when "pgxn"
+      "PGXN"
+    else
+      super
+    end
+  end
+end
+
+loader = Zeitwerk::Loader.for_gem
+loader.inflector = CustomInflector.new(__FILE__)
+loader.enable_reloading
+loader.setup
+
+define_method(:reload!) do
+  loader.reload
+  loader.eager_load
+end
+
+define_method(:load_packages) do |path = nil|
+  path ||= Pathname(File.dirname(__FILE__)).join("..", "packages")
+  loader.push_dir(path)
+  reload!
+end
+
+module Pgpm
+end
diff --git a/lib/pgpm/aspects/inheritance_tracker.rb b/lib/pgpm/aspects/inheritance_tracker.rb
new file mode 100644
index 0000000..9431c43
--- /dev/null
+++ b/lib/pgpm/aspects/inheritance_tracker.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module Pgpm
+  module Aspects
+    module InheritanceTracker
+      module ClassMethods
+        def all_subclasses
+          subclasses + subclasses.flat_map(&:all_subclasses)
+        end
+      end
+
+      def self.included(base_class)
+        base_class.extend(ClassMethods)
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/cache.rb b/lib/pgpm/cache.rb
new file mode 100644
index 0000000..c9fc299
--- /dev/null
+++ b/lib/pgpm/cache.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+require "xdg"
+
+module Pgpm
+  class Cache
+    def self.directory
+      XDG.new.cache_home.join("postgres.pm")
+    end
+  end
+end
diff --git a/lib/pgpm/commands.rb b/lib/pgpm/commands.rb
new file mode 100644
index 0000000..4cc3cc3
--- /dev/null
+++ b/lib/pgpm/commands.rb
@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+require "lspace"
+
+module Pgpm
+  module Commands
+    class Abstract
+      def to_s
+        raise "abstract implementation"
+      end
+    end
+
+    class Make < Abstract
+      def initialize(*args)
+        @args = args
+        super()
+      end
+
+      def to_s
+        command = "make"
+        command += " %{?_smp_mflags}" if Pgpm::OS.in_scope.is_a?(Pgpm::OS::RedHat)
+        command += " #{@args.join(" ")}" unless @args.empty?
+        command
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/on_demand_file.rb b/lib/pgpm/on_demand_file.rb
new file mode 100644
index 0000000..340ae07
--- /dev/null
+++ b/lib/pgpm/on_demand_file.rb
@@ -0,0 +1,24 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class OnDemandFile
+    attr_reader :name
+
+    def initialize(name, proc)
+      @name = name
+      @proc = proc
+    end
+
+    private
+
+    def respond_to_missing?(symbol)
+      @io ||= @proc.call
+      @io.respond_to?(symbol)
+    end
+
+    def method_missing(name, *args)
+      @io ||= @proc.call
+      @io.send(name, *args)
+    end
+  end
+end
diff --git a/lib/pgpm/os.rb b/lib/pgpm/os.rb
new file mode 100644
index 0000000..f140c10
--- /dev/null
+++ b/lib/pgpm/os.rb
@@ -0,0 +1,39 @@
+# frozen_string_literal: true
+
+module Pgpm
+  module OS
+    class Base
+      attr_reader :arch
+
+      include Pgpm::Aspects::InheritanceTracker
+
+      def self.name
+        "unknown"
+      end
+
+      def name
+        self.class.name
+      end
+
+      def self.builder
+        nil
+      end
+
+      def with_scope(&block)
+        LSpace.with(pgpm_target_operating_system: self) do
+          block.yield
+        end
+      end
+    end
+
+    def self.auto_detect
+      return unless RUBY_PLATFORM =~ /linux$/
+
+      Pgpm::OS::Linux.auto_detect
+    end
+
+    def self.in_scope
+      LSpace[:pgpm_target_operating_system]
+    end
+  end
+end
diff --git a/lib/pgpm/os/linux.rb b/lib/pgpm/os/linux.rb
new file mode 100644
index 0000000..a821227
--- /dev/null
+++ b/lib/pgpm/os/linux.rb
@@ -0,0 +1,17 @@
+# frozen_string_literal: true
+
+module Pgpm
+  module OS
+    class Linux < Pgpm::OS::Unix
+      def self.auto_detect
+        return unless File.exist?("/etc/redhat-release")
+
+        RedHat.auto_detect
+      end
+
+      def self.name
+        "linux"
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/os/red_hat.rb b/lib/pgpm/os/red_hat.rb
new file mode 100644
index 0000000..898fe18
--- /dev/null
+++ b/lib/pgpm/os/red_hat.rb
@@ -0,0 +1,399 @@
+# frozen_string_literal: true
+
+require "rbconfig"
+
+module Pgpm
+  module OS
+    class RedHat < Pgpm::OS::Linux
+      def self.auto_detect
+        new # TODO: distinguish between flavors of RedHat
+      end
+
+      def self.name
+        "redhat"
+      end
+    end
+
+    class RockyEPEL9 < Pgpm::OS::RedHat
+      def self.name
+        "rocky+epel-9"
+      end
+
+      def self.builder
+        Pgpm::RPM::Builder
+      end
+
+      def initialize(arch: nil)
+        @arch = arch || RbConfig::CONFIG["host_cpu"]
+        super()
+      end
+
+      def mock_config(_root = "rocky+epel-9-#{@arch}")
+        <<~EOF
+          include('rocky+epel-9-#{@arch}.cfg')
+          config_opts['root'] = 'rocky+epel+pgdg-9-aarch64'
+
+          config_opts['description'] = 'Rocky Linux EPEL 9'
+          config_opts['dnf.conf'] += """
+
+          #########################################################
+          # PGDG Red Hat Enterprise Linux / Rocky repositories	#
+          #########################################################
+
+          # PGDG Red Hat Enterprise Linux / Rocky stable common repository for all PostgreSQL versions
+
+          [pgdg-common]
+          name=PostgreSQL common RPMs for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/common/redhat/rhel-$releasever-$basearch
+          enabled=1
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # Red Hat recently breaks compatibility between 9.n and 9.n+1. PGDG repo is
+          # affected with the LLVM repo. This is a band aid repo for the llvmjit users
+          # whose installations cannot be updated.
+
+          [pgdg-rocky9-sysupdates]
+          name=PostgreSQL Supplementary ucommon RPMs for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/common/pgdg-rocky9-sysupdates/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # We provide extra package to support some RPMs in the PostgreSQL RPM repo, like
+          # consul, haproxy, etc.
+
+          [pgdg-rhel9-extras]
+          name=Extra packages to support some RPMs in the PostgreSQL RPM repo for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/common/pgdg-rhel$releasever-extras/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # PGDG Red Hat Enterprise Linux / Rocky stable repositories:
+
+          [pgdg17]
+          name=PostgreSQL 17 for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/17/redhat/rhel-$releasever-$basearch
+          enabled=1
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg16]
+          name=PostgreSQL 16 for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/16/redhat/rhel-$releasever-$basearch
+          enabled=1
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg15]
+          name=PostgreSQL 15 for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/15/redhat/rhel-$releasever-$basearch
+          enabled=1
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg14]
+          name=PostgreSQL 14 for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/14/redhat/rhel-$releasever-$basearch
+          enabled=1
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg13]
+          name=PostgreSQL 13 for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/13/redhat/rhel-$releasever-$basearch
+          enabled=1
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg12]
+          name=PostgreSQL 12 for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/12/redhat/rhel-$releasever-$basearch
+          enabled=1
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # PGDG RHEL / Rocky / AlmaLinux Updates Testing common repositories.
+
+          [pgdg-common-testing]
+          name=PostgreSQL common testing RPMs for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/testing/common/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # PGDG RHEL / Rocky / AlmaLinux Updates Testing repositories. (These packages should not be used in production)
+          # Available for 12 and above.
+
+          [pgdg17-updates-testing]
+          name=PostgreSQL 17 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/testing/17/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=0
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg16-updates-testing]
+          name=PostgreSQL 16 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/testing/16/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg15-updates-testing]
+          name=PostgreSQL 15 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/testing/15/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg14-updates-testing]
+          name=PostgreSQL 14 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/testing/14/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg13-updates-testing]
+          name=PostgreSQL 13 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/testing/13/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg12-updates-testing]
+          name=PostgreSQL 12 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/testing/12/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # PGDG Red Hat Enterprise Linux / Rocky SRPM testing common repository
+
+          [pgdg-source-common]
+          name=PostgreSQL 12 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/common/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # PGDG RHEL / Rocky / AlmaLinux testing common SRPM repository for all PostgreSQL versions
+
+          [pgdg-common-srpm-testing]
+          name=PostgreSQL common testing SRPMs for RHEL / Rocky / AlmaLinux $releasever - $basearch
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/testing/common/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # PGDG Source RPMs (SRPM), and their testing repositories:
+
+          [pgdg17-source-updates-testing]
+          name=PostgreSQL 17 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/testing/17/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=0
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg16-source]
+          name=PostgreSQL 16 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/16/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg16-source-updates-testing]
+          name=PostgreSQL 16 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/testing/16/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg15-source]
+          name=PostgreSQL 15 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/15/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg15-source-updates-testing]
+          name=PostgreSQL 15 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/testing/15/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg14-source]
+          name=PostgreSQL 14 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/14/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg14-source-updates-testing]
+          name=PostgreSQL 14 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/testing/14/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg13-source]
+          name=PostgreSQL 13 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/13/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg13-source-updates-testing]
+          name=PostgreSQL 13 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source updates testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/testing/13/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg12-source]
+          name=PostgreSQL 12 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/12/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg12-source-updates-testing]
+          name=PostgreSQL 12 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Source update testing
+          baseurl=https://download.postgresql.org/pub/repos/yum/srpms/testing/12/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # Debuginfo/debugsource packages for stable repos
+
+          [pgdg16-debuginfo]
+          name=PostgreSQL 16 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/debug/16/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg15-debuginfo]
+          name=PostgreSQL 15 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/debug/15/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg14-debuginfo]
+          name=PostgreSQL 14 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/debug/14/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg13-debuginfo]
+          name=PostgreSQL 13 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/debug/13/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg12-debuginfo]
+          name=PostgreSQL 12 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/debug/12/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          # Debuginfo/debugsource packages for testing repos
+          # Available for 12 and above.
+
+          [pgdg17-updates-testing-debuginfo]
+          name=PostgreSQL 17 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/testing/debug/17/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=0
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg16-updates-testing-debuginfo]
+          name=PostgreSQL 16 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/testing/debug/16/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=0
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg15-updates-testing-debuginfo]
+          name=PostgreSQL 15 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/testing/debug/15/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg14-updates-testing-debuginfo]
+          name=PostgreSQL 14 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/testing/debug/14/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg13-updates-testing-debuginfo]
+          name=PostgreSQL 13 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/testing/debug/13/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+
+          [pgdg12-updates-testing-debuginfo]
+          name=PostgreSQL 12 for RHEL / Rocky / AlmaLinux $releasever - $basearch - Debuginfo
+          baseurl=https://dnf-debuginfo.postgresql.org/testing/debug/12/redhat/rhel-$releasever-$basearch
+          enabled=0
+          gpgcheck=1
+          gpgkey=https://download.postgresql.org/pub/repos/yum/keys/PGDG-RPM-GPG-KEY-AARCH64-RHEL
+          repo_gpgcheck = 1
+          """
+
+          #config_opts['dnf_install_command'] += ' https://download.postgresql.org/pub/repos/yum/reporpms/EL-9-x86_64/pgdg-redhat-repo-latest.noarch.rpm postgresql16 postgresql16-devel'
+          config_opts['chroot_setup_cmd'] = 'install @development'
+          # https://download.postgresql.org/pub/repos/yum/reporpms/EL-9-aarch64/pgdg-redhat-repo-latest.noarch.rpm'
+
+        EOF
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/os/unix.rb b/lib/pgpm/os/unix.rb
new file mode 100644
index 0000000..d92a01e
--- /dev/null
+++ b/lib/pgpm/os/unix.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Pgpm
+  module OS
+    class Unix < Pgpm::OS::Base
+      def self.name
+        "unix"
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package.rb b/lib/pgpm/package.rb
new file mode 100644
index 0000000..205cedb
--- /dev/null
+++ b/lib/pgpm/package.rb
@@ -0,0 +1,29 @@
+# frozen_string_literal: true
+
+require "dry/inflector"
+
+module Pgpm
+  class Package
+    include Pgpm::Aspects::InheritanceTracker
+    include AbstractPackage
+    include Sources
+    include Naming
+    include Metadata
+    include Dependencies
+    include Git
+    include GitHub
+    include PGXN
+    include Versioning
+    include Subscripting
+    include Enumerating
+    include Building
+    include Initialization
+    include Packaging
+
+    def inspect
+      "#<#{self.class}:#{self.class.package_name} #{version}>"
+    end
+
+    abstract_package
+  end
+end
diff --git a/lib/pgpm/package/abstract_package.rb b/lib/pgpm/package/abstract_package.rb
new file mode 100644
index 0000000..9e55d71
--- /dev/null
+++ b/lib/pgpm/package/abstract_package.rb
@@ -0,0 +1,23 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module AbstractPackage
+      module ClassMethods
+        def abstract_package?
+          @is_abstract_package || false
+        end
+
+        protected
+
+        def abstract_package
+          @is_abstract_package = true
+        end
+      end
+
+      def self.included(base_class)
+        base_class.extend(ClassMethods)
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/building.rb b/lib/pgpm/package/building.rb
new file mode 100644
index 0000000..48ce85e
--- /dev/null
+++ b/lib/pgpm/package/building.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module Building
+      def configure_steps
+        []
+      end
+
+      def build_steps
+        return [Pgpm::Commands::Make.new] if makefile_present?
+
+        []
+      end
+
+      def install_steps
+        return [Pgpm::Commands::Make.new("install", "DESTDIR=$PGPM_BUILDROOT")] if makefile_present?
+
+        []
+      end
+
+      def makefile_present?
+        !Dir.glob(%w[Makefile GNUmakefile makefile], base: source.to_s).empty?
+      end
+
+      def source_url_directory_name
+        nil
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/dependencies.rb b/lib/pgpm/package/dependencies.rb
new file mode 100644
index 0000000..747e694
--- /dev/null
+++ b/lib/pgpm/package/dependencies.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module Dependencies
+      def build_dependencies
+        return ["gcc"] if c_files_present?
+
+        []
+      end
+
+      def dependencies
+        []
+      end
+
+      def c_files_present?
+        Dir.glob("*.c", base: source).any?
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/enumerating.rb b/lib/pgpm/package/enumerating.rb
new file mode 100644
index 0000000..7e864d0
--- /dev/null
+++ b/lib/pgpm/package/enumerating.rb
@@ -0,0 +1,20 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module Enumerating
+      def self.included(base_class)
+        class << base_class
+          include Enumerable
+          def each(&block)
+            if self == Pgpm::Package
+              all_subclasses.each(&block)
+            else
+              package_versions.map { |v| new(v) }.each(&block)
+            end
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/git.rb b/lib/pgpm/package/git.rb
new file mode 100644
index 0000000..0f16cbe
--- /dev/null
+++ b/lib/pgpm/package/git.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+require "git"
+
+module Pgpm
+  class Package
+    module Git
+      Config = Data.define(:url, :download_version_tags)
+
+      module Methods
+        def package_versions
+          if !git_config.download_version_tags
+            super
+          else
+            @tags ||=
+              ::Git.ls_remote(git_config.url)["tags"].keys
+                   .filter { |key| !key.match?(/.+\^{}$/) }
+            versions = @tags.map { |tag| tag.gsub(/^v/, "") }
+            @tag_versions = Hash[@tags.zip(versions)]
+            @version_tags = Hash[versions.zip(@tags)]
+            versions
+          end
+        end
+      end
+
+      def self.included(base_class)
+        base_class.class_eval do
+          def version_git_tag
+            self.class.package_versions if self.class.instance_variable_get(:@version_tags).nil?
+            version_tags = self.class.instance_variable_get(:@version_tags) || {}
+            version_tags[version]
+          end
+
+          def version_git_commit
+            nil
+          end
+
+          def source
+            directory = Pgpm::Cache.directory.join(name, version)
+            tag = version_git_tag
+            commit = version_git_commit
+            directory = Pgpm::Cache.directory.join(name, commit) if commit
+            if File.directory?(directory) && File.directory?(directory.join(".git"))
+              directory
+            elsif File.directory?(directory)
+              raise "Unexpected non-git directory #{directory}"
+            else
+              if tag
+                ::Git.clone(self.class.git_config.url, directory, depth: 1, branch: version_git_tag)
+              elsif commit
+                g = ::Git.clone(self.class.git_config.url, directory)
+                g.checkout("checkout-#{commit}", new_branch: true, start_point: commit)
+              else
+                ::Git.clone(self.class.git_config.url, directory, depth: 1)
+              end
+              directory
+            end
+          end
+        end
+
+        class << base_class
+          @git_config = nil
+          attr_reader :git_config
+
+          def git(url, download_version_tags: true)
+            @git_config = Config.new(url:, download_version_tags:)
+            extend Methods
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/git_hub.rb b/lib/pgpm/package/git_hub.rb
new file mode 100644
index 0000000..accd8da
--- /dev/null
+++ b/lib/pgpm/package/git_hub.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require "open-uri"
+
+module Pgpm
+  class Package
+    module GitHub
+      Config = Data.define(:name, :download_version_tags)
+
+      def sources
+        commit = version_git_tag || version_git_commit
+        [Pgpm::OnDemandFile.new("#{version}.tar.gz", lambda {
+          URI.open("https://github.com/#{self.class.github_config.name}/archive/#{commit}.tar.gz")
+        })] + super
+      end
+
+      module ClassMethods
+        attr_reader :github_config
+
+        def github(name, download_version_tags: true)
+          @github_config = Config.new(name:, download_version_tags:)
+          include Pgpm::Package::Git
+          git "https://github.com/#{@github_config.name}", download_version_tags:
+        end
+      end
+
+      def self.included(base_class)
+        base_class.extend(ClassMethods)
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/initialization.rb b/lib/pgpm/package/initialization.rb
new file mode 100644
index 0000000..5a1c424
--- /dev/null
+++ b/lib/pgpm/package/initialization.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module Initialization
+      def initialize(version)
+        @version = version
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/metadata.rb b/lib/pgpm/package/metadata.rb
new file mode 100644
index 0000000..6f46e3b
--- /dev/null
+++ b/lib/pgpm/package/metadata.rb
@@ -0,0 +1,45 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module Metadata
+      def summary
+        self.class.summary
+      end
+
+      def description
+        self.class.description
+      end
+
+      def all_searchable_texts
+        self.class.all_searchable_texts
+      end
+
+      def license
+        self.class.license
+      end
+
+      module ClassMethods
+        def summary
+          "TODO: Summary"
+        end
+
+        def description
+          "TODO: Description"
+        end
+
+        def license
+          "TODO: License"
+        end
+
+        def all_searchable_texts
+          [package_name, summary, description]
+        end
+      end
+
+      def self.included(base_class)
+        base_class.extend(ClassMethods)
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/naming.rb b/lib/pgpm/package/naming.rb
new file mode 100644
index 0000000..603fc82
--- /dev/null
+++ b/lib/pgpm/package/naming.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module Naming
+      module ClassMethods
+        def package_name
+          class_name = to_s.split("::").last
+          @name || Dry::Inflector.new.underscore(class_name)
+        end
+
+        protected
+
+        def name(name)
+          @name = name
+        end
+      end
+
+      def self.included(base_class)
+        base_class.extend(ClassMethods)
+      end
+
+      def name
+        self.class.package_name
+      end
+
+      def extension_name
+        name
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/packaging.rb b/lib/pgpm/package/packaging.rb
new file mode 100644
index 0000000..cabcdc8
--- /dev/null
+++ b/lib/pgpm/package/packaging.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module Packaging
+      def to_rpm_spec(**opts)
+        Pgpm::RPM::Spec.new(self, **opts)
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/pgxn.rb b/lib/pgpm/package/pgxn.rb
new file mode 100644
index 0000000..f12d854
--- /dev/null
+++ b/lib/pgpm/package/pgxn.rb
@@ -0,0 +1,83 @@
+# frozen_string_literal: true
+
+require "oj"
+
+module Pgpm
+  class Package
+    module PGXN
+      def provides_pgxn_meta_json?
+        File.directory?(source) && File.file?(pgxn_meta_json_path)
+      end
+
+      def pgxn_meta_json
+        @pgxn_meta_json ||= Oj.load(File.read(pgxn_meta_json_path))
+      end
+
+      def pgxn_meta_json_path
+        source.join("META.json")
+      end
+
+      def extension_name
+        if provides_pgxn_meta_json?
+          pgxn_meta_json["name"]
+        else
+          super
+        end
+      end
+
+      def summary
+        if provides_pgxn_meta_json?
+          pgxn_meta_json["abstract"]
+        else
+          super
+        end
+      end
+
+      def description
+        if provides_pgxn_meta_json?
+          pgxn_meta_json["description"]
+        else
+          super
+        end
+      end
+
+      def license
+        if provides_pgxn_meta_json?
+          lic = pgxn_meta_json["license"]
+          case lic
+          when Hash
+            lic.keys.join(" or ")
+          when Array
+            lic.join(" or ")
+          when String
+            lic
+          end
+        else
+          super
+        end
+      end
+
+      module ClassMethods
+        def extension_name
+          self[:latest].extension_name
+        end
+
+        def description
+          self[:latest].description
+        end
+
+        def summary
+          self[:latest].summary
+        end
+
+        def license
+          self[:latest].license
+        end
+      end
+
+      def self.included(base_class)
+        base_class.extend(ClassMethods)
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/sources.rb b/lib/pgpm/package/sources.rb
new file mode 100644
index 0000000..bd2d006
--- /dev/null
+++ b/lib/pgpm/package/sources.rb
@@ -0,0 +1,11 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module Sources
+      def sources
+        []
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/subscripting.rb b/lib/pgpm/package/subscripting.rb
new file mode 100644
index 0000000..32a634e
--- /dev/null
+++ b/lib/pgpm/package/subscripting.rb
@@ -0,0 +1,32 @@
+# frozen_string_literal: true
+
+require "semver_dialects"
+
+module Pgpm
+  class Package
+    module Subscripting
+      module ClassMethods
+        def [](name)
+          if self == Pgpm::Package
+            all_subclasses.find { |klass| klass.package_name == name }
+          elsif name == :latest && package_versioning_scheme == :semver
+            return nil if package_versions.empty?
+
+            version = package_versions.map { |ver| SemverDialects.parse_version("cargo", ver) }.last
+            new(version.to_s)
+          elsif name == :latest
+            null
+          elsif package_versions.include?(name)
+            new(name)
+          else
+            all_subclasses.find { |klass| klass.package_name == name }
+          end
+        end
+      end
+
+      def self.included(base_class)
+        base_class.extend(ClassMethods)
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/package/versioning.rb b/lib/pgpm/package/versioning.rb
new file mode 100644
index 0000000..d86873b
--- /dev/null
+++ b/lib/pgpm/package/versioning.rb
@@ -0,0 +1,28 @@
+# frozen_string_literal: true
+
+module Pgpm
+  class Package
+    module Versioning
+      module ClassMethods
+        def package_versions
+          warn("No versions defined for #{package_name}")
+          []
+        end
+
+        def package_versioning_scheme
+          @package_versioning_scheme ||= :semver
+        end
+
+        def versioning_scheme(scheme)
+          @package_versioning_scheme = scheme
+        end
+      end
+
+      def self.included(base_class)
+        base_class.extend(ClassMethods)
+      end
+
+      attr_reader :version
+    end
+  end
+end
diff --git a/lib/pgpm/postgres.rb b/lib/pgpm/postgres.rb
new file mode 100644
index 0000000..f9f2006
--- /dev/null
+++ b/lib/pgpm/postgres.rb
@@ -0,0 +1,25 @@
+# frozen_string_literal: true
+
+require "semver_dialects"
+
+module Pgpm
+  module Postgres
+    class Distribution
+      def initialize(postgres_version)
+        @postgres_version = postgres_version
+      end
+
+      def build_time_requirement_packages
+        raise NotImplementedError
+      end
+    end
+
+    class RedhatBasedPGDG < Distribution
+      def build_time_requirement_packages
+        version = SemverDialects.parse_version("cargo", @postgres_version)
+        major = version.tokens.first
+        ["postgresql#{major}-#{version}-", "postgresql17-"]
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/rpm.rb b/lib/pgpm/rpm.rb
new file mode 100644
index 0000000..3fd93b7
--- /dev/null
+++ b/lib/pgpm/rpm.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+require "digest"
+require "open-uri"
+
+module Pgpm
+  module RPM
+  end
+end
diff --git a/lib/pgpm/rpm/builder.rb b/lib/pgpm/rpm/builder.rb
new file mode 100644
index 0000000..7769f8f
--- /dev/null
+++ b/lib/pgpm/rpm/builder.rb
@@ -0,0 +1,63 @@
+# frozen_string_literal: true
+
+module Pgpm
+  module RPM
+    class Builder
+      def initialize(spec, os: nil)
+        @spec = spec
+        @os = os || Pgpm::OS.auto_detect
+      end
+
+      def source_builder(target_directory = nil)
+        target_directory ||= "."
+        @os.with_scope do
+          dir = Dir.mktmpdir("pgpm")
+          File.open(Pathname(dir).join("#{@spec.package.name}.spec"), "w") do |specfile|
+            specfile.write(@spec.to_s)
+            specfile.close
+            sources = File.join(dir, "sources")
+            FileUtils.mkdir_p(sources)
+            @spec.package.sources.map do |src|
+              print "Downloading #{src.name}..."
+              srcfile = File.join(sources, src.name)
+              File.write(srcfile, src.read)
+              puts " done."
+            end
+            cfg = Pgpm::RPM::Mock::Config.new(@os.mock_config, path: target_directory)
+            Pgpm::RPM::Mock::Operation.buildsrpm(specfile.path, sources, config: cfg.path, result_dir: target_directory, cb: lambda {
+              FileUtils.rm_rf(dir)
+            })
+          end
+        end
+      end
+
+      def versionless_builder(target_directory = nil)
+        target_directory ||= "."
+        @os.with_scope do
+          dir = Dir.mktmpdir("pgpm")
+          File.open(Pathname(dir).join("#{@spec.package.name}.spec"), "w") do |specfile|
+            specfile.write(@spec.versionless)
+            specfile.close
+            cfg = Pgpm::RPM::Mock::Config.new(@os.mock_config, path: target_directory)
+            Pgpm::RPM::Mock::Operation.buildsrpm(specfile.path, nil, config: cfg.path, result_dir: target_directory, cb: lambda {
+              FileUtils.rm_rf(dir)
+            })
+          end
+        end
+      end
+
+      def self.builder(srpm, os: nil)
+        os ||= Pgpm::OS.auto_detect
+        os.with_scope do
+          target_directory ||= "."
+          cfg = Pgpm::RPM::Mock::Config.new(os.mock_config, path: target_directory)
+          srpm = [srpm] if srpm.is_a?(String)
+          srpm.reduce(nil) do |b, rpm|
+            op = Pgpm::RPM::Mock::Operation.rebuild(rpm, config: cfg.path, result_dir: target_directory)
+            b.nil? ? op : b.chain(op)
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/rpm/mock/config.rb b/lib/pgpm/rpm/mock/config.rb
new file mode 100644
index 0000000..dd9febe
--- /dev/null
+++ b/lib/pgpm/rpm/mock/config.rb
@@ -0,0 +1,21 @@
+# frozen_string_literal: true
+
+module Pgpm
+  module RPM
+    module Mock
+      class Config
+        def initialize(source, path: nil)
+          @source = source
+          @path = path
+          @digest = Digest::SHA1.hexdigest(source)
+        end
+
+        def path
+          f = Pathname(@path).join("mock-#{@digest}.cfg")
+          File.write(f, @source) if !File.exist?(f) || @digest != Digest::SHA1.hexdigest(File.read(f))
+          f
+        end
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/rpm/mock/operation.rb b/lib/pgpm/rpm/mock/operation.rb
new file mode 100644
index 0000000..5d6bb22
--- /dev/null
+++ b/lib/pgpm/rpm/mock/operation.rb
@@ -0,0 +1,75 @@
+# frozen_string_literal: true
+
+module Pgpm
+  module RPM
+    module Mock
+      class Operation
+        def self.buildsrpm(spec, sources, config: nil, result_dir: nil, cb: nil)
+          buffer_result_dir = Dir.mktmpdir("pgpm")
+          args = ["--chain", "--buildsrpm", "--spec", spec, "--resultdir",
+                  buffer_result_dir]
+          args.push("--sources", sources) if sources
+          args.push("-r", config.to_s) unless config.nil?
+          new(*args, cb: lambda {
+            rpms = Dir.glob("*.rpm", base: buffer_result_dir).map do |f|
+              FileUtils.cp(Pathname(buffer_result_dir).join(f), result_dir) unless result_dir.nil?
+              f
+            end
+            FileUtils.rm_rf(buffer_result_dir)
+            cb.call unless cb.nil?
+            rpms
+          })
+        end
+
+        def self.rebuild(srpm, config: nil, result_dir: nil, cb: nil)
+          buffer_result_dir = Dir.mktmpdir("pgpm")
+          args = ["--chain", "--rebuild", srpm, "--resultdir", buffer_result_dir]
+          args.push("-r", config.to_s) unless config.nil?
+          new(*args, cb: lambda {
+            rpms = Dir.glob("*.rpm", base: buffer_result_dir).map do |f|
+              FileUtils.cp(Pathname(buffer_result_dir).join(f), result_dir) unless result_dir.nil?
+              f
+            end
+            FileUtils.rm_rf(buffer_result_dir)
+            cb.call unless cb.nil?
+            rpms
+          })
+        end
+
+        def initialize(*args, cb: nil)
+          @args = args
+          @cb = cb
+        end
+
+        attr_reader :args, :cb
+
+        def call
+          command = "mock #{@args.join(" ")}"
+          raise "Failed to execute `#{command}`" unless system command
+
+          @cb&.call
+        end
+
+        def chain(op)
+          self.class.new(*(@args + op.args), cb: lambda {
+            res1 = @cb&.call
+            res2 = op.cb&.call
+            return res1 + res2 if res1.is_a?(Array) && res2.is_a?(Array)
+
+            res2
+          })
+        end
+
+        def and_then(op)
+          lambda do
+            res1 = call
+            res2 = op.call
+            return res1 + res2 if res1.is_a?(Array) && res2.is_a?(Array)
+
+            [res1, res2]
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/rpm/spec.rb b/lib/pgpm/rpm/spec.rb
new file mode 100644
index 0000000..f243619
--- /dev/null
+++ b/lib/pgpm/rpm/spec.rb
@@ -0,0 +1,102 @@
+# frozen_string_literal: true
+
+require "digest"
+require "open-uri"
+
+module Pgpm
+  module RPM
+    class Spec
+      attr_reader :package, :release, :postgres_version, :postgres_distribution
+
+      def initialize(package, postgres_version: nil, postgres_distribution: nil)
+        @package = package
+        @release = 1
+
+        @postgres_version = postgres_version || "17"
+        @postgres_distribution = postgres_distribution || "postgresql#{@postgres_version}"
+      end
+
+      def versionless
+        <<~EOF
+          Name: pgpm-#{@package.name}-#{@postgres_version}
+          Version: #{@package.version}
+          Release: #{@release}%{?dist}
+          Summary: #{@package.summary}
+          License: #{@package.license}
+
+          Requires: pgpm-#{@package.name}-#{@postgres_version}_#{@package.version}
+          BuildArch:  noarch
+
+          %description
+          #{@package.description}
+
+          %build
+
+          %clean
+          rm -rf $RPM_BUILD_ROOT
+
+          %install
+
+          %files
+        EOF
+      end
+
+      def to_s
+        setup_opts = ["-q"]
+        if @package.source_url_directory_name
+          setup_opts.push("-n", @package.source_url_directory_name)
+        else
+          setup_opts.push("-n", "#{@package.name}-#{@package.version}")
+        end
+        sources = @package.sources
+        <<~EOF
+          Name: pgpm-#{@package.name}-#{@postgres_version}_#{@package.version}
+          Version: #{@package.version}
+          Release: 1%{?dist}
+          Summary: #{@package.summary}
+          License: #{@package.license}
+          #{sources.each_with_index.map { |src, index| "Source#{index}: #{src.name}" }.join("\n")}
+
+          BuildRequires: #{@postgres_distribution} #{@postgres_distribution}-devel #{@postgres_distribution}-server
+          #{@package.build_dependencies.map { |dep| "BuildRequires: #{dep}" }.join("\n")}
+          Requires: #{@postgres_distribution}
+
+          %description
+          #{@package.description}
+
+          %prep
+          %setup #{setup_opts.join(" ")}
+          #{(sources[1..] || []).filter { |s| unpack?(s) }.each_with_index.map { |_src, index| "%setup -T -D #{setup_opts.join(" ")} -a #{index + 1}" }.join("\n")}
+
+          export PG_CONFIG=$(rpm -ql #{@postgres_distribution} | grep 'pg_config$')
+          #{@package.configure_steps.map(&:to_s).join("\n")}
+
+          %build
+          export PG_CONFIG=$(rpm -ql #{@postgres_distribution} | grep 'pg_config$')
+          export PGPM_BUILDROOT=%{buildroot}
+          #{@package.build_steps.map(&:to_s).join("\n")}
+
+          %install
+          export PG_CONFIG=$(rpm -ql #{@postgres_distribution} | grep 'pg_config$')
+          export PGPM_BUILDROOT=%{buildroot}
+          find %{buildroot} -type f | sort - | sed 's|^%{buildroot}||' > .pgpm_before | sort
+          #{@package.install_steps.map(&:to_s).join("\n")}
+          find %{buildroot} -type f | sort - | sed 's|^%{buildroot}||' > .pgpm_after | sort
+          comm -13 .pgpm_before .pgpm_after | sort -u > filelist.txt
+
+          %files -f filelist.txt
+
+
+          %changelog
+        EOF
+      end
+
+      private
+
+      def unpack?(src)
+        src = src.name if src.respond_to?(:name)
+        src.to_s.end_with?(".tar.gz")
+      end
+    end
+  end
+end
diff --git a/lib/pgpm/version.rb b/lib/pgpm/version.rb
new file mode 100644
index 0000000..48768ba
--- /dev/null
+++ b/lib/pgpm/version.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+module Pgpm
+  VERSION = "0.1.0"
+end
diff --git a/packages/omnigres/extension_discovery.rb b/packages/omnigres/extension_discovery.rb
new file mode 100644
index 0000000..711b3ea
--- /dev/null
+++ b/packages/omnigres/extension_discovery.rb
@@ -0,0 +1,73 @@
+# frozen_string_literal: true
+
+require "git"
+require "parallel"
+
+module Omnigres
+  class ExtensionDiscovery
+    @@extensions = {}
+    @@git_revisions = {}
+
+    def initialize(revision: nil, path: nil)
+      return if @@extensions[revision]
+
+      suffix = revision ? "-#{revision}" : nil
+      path ||= Pgpm::Cache.directory.join("omnigres#{suffix}")
+      git =
+        if File.directory?(path)
+          ::Git.open(path)
+        else
+          ::Git.clone("https://github.com/omnigres/omnigres", path)
+        end
+      git.checkout(revision) if revision
+      @git = git
+    end
+
+    attr_reader :git
+
+    def extension_versions
+      process_git_log
+      @@extensions[@git.log.first.sha]
+    end
+
+    def extension_git_revisions
+      process_git_log
+      @@git_revisions[@git.log.first.sha]
+    end
+
+    private
+
+    def process_git_log
+      return if @@extensions[@git.log.first.sha]
+
+      merges = @git.log(:all).select { |c| c.parents.size > 1 }
+      commit_merges = Hash[Parallel.flat_map(merges) do |m|
+        before = m.parents[0].sha
+        after = m.parents[1].sha
+        commits = git.log.between(before, after).map(&:sha)
+        commits.product([m.sha])
+      end]
+
+      versions_maps = @git.log(:all).path("versions.txt").flat_map do |c|
+        Hash[@git.show(c,
+                       "versions.txt").split("\n").map do |l|
+               ext, ver = l.split("=")
+               [[ext, c.sha], ver]
+             end]
+      end
+      extensions = versions_maps.flat_map(&:keys).map(&:first).uniq
+      @@extensions[@git.log.first.sha] = Hash[extensions.map do |e|
+        [e, versions_maps.map do |m|
+          m.transform_keys(&:first)[e]
+        end.compact.uniq.map { |v| SemverDialects.parse_version("cargo", v) }.sort.map(&:to_s)]
+      end]
+      last_hashes = Hash[versions_maps.flat_map do |h|
+        h.each_pair.map { |(ext, sha), ver| [[ext, ver], sha] }
+      end]
+      @@git_revisions[@git.log.first.sha] = last_hashes.each_with_object({}) do |((name, version), sha), result|
+        result[name] ||= {}
+        result[name][version] = commit_merges[sha]
+      end
+    end
+  end
+end
diff --git a/packages/omnigres/omni.rb b/packages/omnigres/omni.rb
new file mode 100644
index 0000000..9dec2b2
--- /dev/null
+++ b/packages/omnigres/omni.rb
@@ -0,0 +1,174 @@
+# frozen_string_literal: true
+
+require "minitar"
+require "find"
+require "zlib"
+require "progress"
+
+module Omnigres
+  class Omni < Pgpm::Package
+    github "omnigres/omnigres", download_version_tags: false
+
+    def initialize(version)
+      @fetch_previous_version = true
+      super
+    end
+
+    def summary
+      "Advanced adapter for Postgres extensions"
+    end
+
+    def description
+      summary
+    end
+
+    def self.package_versions
+      ExtensionDiscovery.new.extension_versions["omni"]
+    end
+
+    def version_git_commit
+      ExtensionDiscovery.new.extension_git_revisions["omni"][version]
+    end
+
+    def configure_steps
+      ["export PIP_CONFIG_FILE=$(pwd)/deps/pip.conf",
+       "cmake -S extensions/omni -B build -DCMAKE_BUILD_TYPE=RelWithDebInfo " \
+         "-DOPENSSL_CONFIGURED=1 -DPG_CONFIG=$PG_CONFIG -DCPM_SOURCE_CACHE=$(pwd)/deps/_deps"]
+    end
+
+    def build_steps
+      [
+        "cmake --build build --parallel --target package_omni_extension",
+        "cmake --build build --parallel --target package_omni_migrations",
+        "scripts/generate_upgrade.sh #{name} #{previous_version.version} " \
+          "$(pwd)/omnigres-#{previous_version.version_git_commit} #{version} $(pwd)"
+      ]
+    end
+
+    def install_steps
+      [
+        "mkdir -p $PGPM_BUILDROOT/$($PG_CONFIG --sharedir)/extension",
+        "mkdir -p $PGPM_BUILDROOT/$($PG_CONFIG --pkglibdir)",
+        "cp build/packaged/*.so $PGPM_BUILDROOT/$($PG_CONFIG --pkglibdir)",
+        "cp build/packaged/extension/*.control $PGPM_BUILDROOT/$($PG_CONFIG --sharedir)/extension",
+        "cp build/packaged/extension/*.sql $PGPM_BUILDROOT/$($PG_CONFIG --sharedir)/extension"
+      ]
+    end
+
+    def license
+      "Apache 2.0"
+    end
+
+    def build_dependencies
+      %w[cmake openssl-devel python3 python3-devel nc sudo] + super
+    end
+
+    def dependencies
+      ["openssl"] + super
+    end
+
+    def source_url_directory_name
+      "omnigres-#{version_git_commit}"
+    end
+
+    class UnsupportedVersion < StandardError
+      def message
+        "This version of omnigres extension is too old"
+      end
+    end
+
+    def deps_tar_gz(dir_name = "deps")
+      @os = Pgpm::OS.auto_detect
+      if @os.is_a?(Pgpm::OS::RedHat)
+        system "sudo dnf -y install libxml2-devel libxslt-devel cmake gcc g++ python3-devel"
+      end
+      recipe_hash = Digest::SHA1.hexdigest(File.read(__FILE__) + scripts_tar_gz.read)
+      deps = File.join(source, dir_name)
+      src = source.to_s
+      ready_marker = File.join(src, ".complete.#{recipe_hash}")
+      targz = File.join(src, "deps-#{recipe_hash}.tar.gz")
+      unless File.exist?(ready_marker)
+        raise UnsupportedVersion unless File.directory?(File.join(src, "cmake", "dependencies"))
+        # FIXME: this is not perfect as we're still required to have the build-time dependencies
+        # required for this (such as g++, python3-devel, cmake, g++, etc...)
+        unless system "cmake -S #{src}/cmake/dependencies -B #{deps} -DCPM_SOURCE_CACHE=#{deps}/_deps"
+          raise "Can't fetch dependencies"
+        end
+
+        begin
+          sgz = Zlib::GzipWriter.new(File.open(targz, "wb"))
+          tar = Minitar::Output.open(sgz)
+          files = Find.find(deps).filter do |entry|
+            # Don't include .git
+            Pathname(entry).each_filename.map { |f| f == ".git" }.none?
+          end
+          files.with_progress("Preparing #{dir_name}.tar.gz") do |entry|
+            stat = File.stat(entry)
+            data = File.directory?(entry) ? nil : File.binread(entry)
+            info = { name: Pathname(entry).relative_path_from(src).to_s,
+                     mode: stat.mode, uid: stat.uid, gid: stat.gid, mtime: stat.mtime }
+            Minitar.pack_as_file(info, data, tar)
+          end
+        ensure
+          tar.close
+        end
+        FileUtils.touch(ready_marker)
+      end
+      Pgpm::OnDemandFile.new("#{dir_name}.tar.gz", -> { File.open(targz) })
+    end
+
+    attr_accessor :fetch_previous_version
+
+    def sources
+      srcs = super
+      srcs.push(deps_tar_gz)
+      if fetch_previous_version && previous_version
+        begin
+          prev_version = previous_version
+          puts "Fetching previous version #{prev_version.version} to be able to generate migrations"
+          prev_version.fetch_previous_version = false
+          srcs.push(prev_version.sources[0]) # archive
+          srcs.push(prev_version.deps_tar_gz("deps-prev")) # deps
+        rescue UnsupportedVersion
+          # ignore this one, just don't build an upgrade
+          puts "Ignore #{prev_version.version}, it is unsupported"
+        end
+      end
+
+      srcs.push(scripts_tar_gz)
+      srcs
+    end
+
+    private
+
+    def previous_version
+      return @previous_version if @previous_version
+
+      sorted_versions = self.class.package_versions.sort_by { |v| SemverDialects.parse_version("cargo", v) }.map(&:to_s)
+      index = sorted_versions.index(version)
+      return unless index.positive?
+
+      @previous_version = self.class[sorted_versions[index - 1]]
+    end
+
+    def scripts_tar_gz
+      s = String.new
+      begin
+        dir = File.join(File.dirname(__FILE__), "scripts")
+        sgz = Zlib::GzipWriter.new(StringIO.new(s))
+        tar = Minitar::Output.open(sgz)
+        Find.find(dir) do |entry|
+          stat = File.stat(entry)
+          data = File.directory?(entry) ? nil : File.binread(entry)
+          info = { name: Pathname(entry).relative_path_from(File.dirname(__FILE__)).to_s,
+                   mode: stat.mode, uid: stat.uid, gid: stat.gid, mtime: stat.mtime }
+          Minitar.pack_as_file(info, data, tar)
+        end
+      ensure
+        # Closes both tar and sgz.
+        tar.close
+      end
+      Pgpm::OnDemandFile.new("scripts.tar.gz", -> { StringIO.open(s) })
+    end
+  end
+end
diff --git a/packages/omnigres/scripts/generate_upgrade.sh b/packages/omnigres/scripts/generate_upgrade.sh
new file mode 100755
index 0000000..54dd439
--- /dev/null
+++ b/packages/omnigres/scripts/generate_upgrade.sh
@@ -0,0 +1,138 @@
+#! /usr/bin/env bash
+
+script_dir=$(dirname "$0")
+
+BUILD_TYPE=${BUILD_TYPE:=RelWithDebInfo}
+DEST_DIR=${DESTDIR:=$script_dir}
+
+PG_CONFIG=${PG_CONFIG:=pg_config}
+PG_BINDIR=$($PG_CONFIG --bindir)
+PG_LIBDIR=$($PG_CONFIG --pkglibdir)
+PGSHAREDIR=$($PG_CONFIG --sharedir)
+
+ext_name=$1
+old_ver=$2
+old_ver_path=$3
+new_ver=$4
+new_ver_path=$5
+
+# for now, just for omni
+new_ver_omni_ver=$(cat ${new_ver_path}/versions.txt | grep "^$ext_name=" | cut -d "=" -f 2)
+old_ver_omni_ver=$(cat ${old_ver_path}/versions.txt | grep "^$ext_name=" | cut -d "=" -f 2)
+
+set -xe
+
+# Build the old extension
+PIP_CONFIG_FILE=${new_ver_path}/deps-prev/pip.conf cmake -S "${old_ver_path}/extensions/${ext_name}" -B "${old_ver_path}/build" -DCPM_SOURCE_CACHE=$new_ver_path/deps-prev/_deps -DPG_CONFIG=$PG_CONFIG -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DOPENSSL_CONFIGURED=1
+cmake --build "${old_ver_path}/build" --parallel --target package_omni_extension
+cmake --build "${old_ver_path}/build" --parallel --target package_omni_migrations
+cmake --build "${old_ver_path}/build" --parallel --target package_${ext_name}_extension
+cmake --build "${old_ver_path}/build" --parallel --target package_${ext_name}_migrations
+#
+
+file $old_ver_path/build/packaged/omni--$old_ver_omni_ver.so
+file $new_ver_path/build/packaged/omni--$new_ver_omni_ver.so
+
+# Determine the path to the extension in the new version
+extpath=$(cat ${new_ver_path}/build/paths.txt | grep "^$ext_name " | cut -d " " -f 2)
+
+# List migrations in new version
+new_migrations=()
+new_migrate_path="$new_ver_path/$extpath/migrate"
+if [ -d "$new_migrate_path/$ext_name" ]; then
+   # Extension that shares a folder with another extension
+   new_migrate_path="$new_migrate_path/$ext_name"
+fi
+for file in "$new_migrate_path/"*.sql; do
+  new_migrations+=($(basename "$file"))
+done
+
+echo $new_migrations
+
+# Determine the path to the extension in the old version
+extpath=$(cat ${old_ver_path}/build/paths.txt | grep "^$ext_name " | cut -d " " -f 2)
+# List migrations in old version
+old_migrations=()
+old_migrate_path="$old_ver_path/$extpath/migrate"
+if [ -d "$old_migrate_path/$ext_name" ]; then
+   # Extension that shares a folder with another extension
+   old_migrate_path="$old_migrate_path/$ext_name"
+fi
+for file in "$old_migrate_path/"*.sql; do
+  old_migrations+=($(basename "$file"))
+done
+
+echo $old_migrations
+
+
+for mig in ${new_migrations[@]}; do
+  if [ ! -f "$old_migrate_path/$mig" ]; then
+     $new_ver_path/build/inja/inja "$new_migrate_path/$mig" >> "$DEST_DIR/$ext_name--$old_ver--$new_ver.sql"
+     # Ensure a new line
+     echo >> "$DEST_DIR/$ext_name--$old_ver--$new_ver.sql"
+  fi
+done
+
+cat "$DEST_DIR/$ext_name--$old_ver--$new_ver.sql"
+
+# Now, we need to replace functions that have changed
+# For this, we'll:
+# * prepare a database
+db="$DEST_DIR/db_$ext_name-$old_ver-$new_ver"
+rm -rf "$db"
+chown -R postgres "$DEST_DIR"
+sudo -u postgres "$PG_BINDIR/initdb" -D "$db" --no-clean --no-sync --locale=C --encoding=UTF8
+sockdir=$(sudo -u postgres mktemp -d)
+# * install the extension in this revision, snapshot pg_proc, drop the extension
+# We copy all scripts because there are dependencies
+cp -v "$old_ver_path"/build/packaged/extension/*.sql "$old_ver_path"/build/packaged/extension/*.control "$PGSHAREDIR/extension"
+cp -v "$old_ver_path"/build/packaged/*.so "$PG_LIBDIR"
+sudo -u postgres "$PG_BINDIR/pg_ctl" start -D "$db" -o "-c max_worker_processes=64" -o "-c listen_addresses=''" -o "-k $sockdir" -o "-c shared_preload_libraries='$PG_LIBDIR/omni--$old_ver_omni_ver.so'"
+sudo -u postgres "$PG_BINDIR/createdb" -h "$sockdir" "$ext_name"
+cat <<EOF | sudo -u postgres "$PG_BINDIR/psql" -h "$sockdir" $ext_name -v ON_ERROR_STOP=1
+     create table procs0 as (select * from pg_proc);
+     create extension $ext_name version '$old_ver' cascade;
+     create table procs as (select pg_proc.*, pg_get_functiondef(pg_proc.oid) as src, pg_get_function_identity_arguments(pg_proc.oid) as identity_args from pg_proc left outer join procs0 on pg_proc.oid = procs0.oid
+     inner join pg_language on pg_language.oid = pg_proc.prolang
+     inner join pg_namespace on pg_namespace.oid = pg_proc.pronamespace and pg_namespace.nspname = '$ext_name'
+     left outer join pg_aggregate on pg_aggregate.aggfnoid = pg_proc.oid
+     where procs0.oid is null and aggfnoid is null and lanname not in ('c', 'internal'));
+     drop extension $ext_name cascade;
+EOF
+sudo -u postgres "$PG_BINDIR/pg_ctl" stop -D  "$db" -m smart
+# We copy all scripts because there are dependencies
+cp -v "$new_ver_path"/build/packaged/extension/*.sql "$new_ver_path"/build/packaged/extension/*.control "$PGSHAREDIR/extension"
+cp -v "$new_ver_path"/build/packaged/*.so "$PG_LIBDIR"
+sudo -u postgres "$PG_BINDIR/pg_ctl" start -D "$db" -o "-c max_worker_processes=64" -o "-c listen_addresses=''" -o "-k $sockdir"  -o "-c shared_preload_libraries='$PG_LIBDIR/omni--$new_ver_omni_ver.so'"
+# * install the extension from the head revision
+echo "create extension $ext_name version '$new_ver' cascade;" | sudo -u postgres "$PG_BINDIR/psql" -h "$sockdir" -v ON_ERROR_STOP=1 $ext_name
+# get changed functions
+cat <<EOF | sudo -u postgres "$PG_BINDIR/psql" -h "$sockdir" $ext_name -v ON_ERROR_STOP=1 -t -A -F "," -X >> "$DEST_DIR/$ext_name--$old_ver--$new_ver.sql"
+    -- Changed code
+    select pg_get_functiondef(pg_proc.oid) || ';' from (select * from pg_proc where oid not in (select aggfnoid from pg_aggregate)) as pg_proc
+    inner join pg_language on pg_language.oid = pg_proc.prolang and pg_language.lanname not in ('c', 'internal')
+    inner join pg_namespace on pg_namespace.oid = pg_proc.pronamespace and pg_namespace.nspname = '$ext_name'
+    inner join procs on
+    ((procs.proname::text = pg_proc.proname::text) and procs.pronamespace = pg_proc.pronamespace and
+      pg_get_function_identity_arguments(pg_proc.oid) = identity_args and pg_get_functiondef(pg_proc.oid) != procs.src);
+EOF
+# test the upgrade
+# first, let's stop current database to load older extension again
+sudo -u postgres "$PG_BINDIR/pg_ctl" stop -D  "$db" -m smart
+cp "$DEST_DIR/$ext_name--$old_ver--$new_ver.sql" "$old_ver_path/build/packaged/extension/$ext_name--$old_ver.control" "$old_ver_path/build/packaged/extension/$ext_name--$old_ver.sql" "$PGSHAREDIR/extension"
+sudo -u postgres "$PG_BINDIR/pg_ctl" start -D "$db" -o "-c max_worker_processes=64" -o "-c listen_addresses=''" -o "-k $sockdir" -o "-c shared_preload_libraries='$PG_LIBDIR/omni--$old_ver_omni_ver.so'"
+cat <<EOF | sudo -u postgres "$PG_BINDIR/psql" -h "$sockdir" $ext_name -v ON_ERROR_STOP=1
+        drop extension $ext_name;
+        create extension $ext_name version '$old_ver' cascade;
+EOF
+sudo -u postgres "$PG_BINDIR/pg_ctl" stop -D  "$db" -m smart
+sudo -u postgres "$PG_BINDIR/pg_ctl" start -D "$db" -o "-c max_worker_processes=64" -o "-c listen_addresses=''" -o "-k $sockdir"  -o "-c shared_preload_libraries='$PG_LIBDIR/omni--$new_ver_omni_ver.so'"
+    cat <<EOF | sudo -u postgres "$PG_BINDIR/psql" -h "$sockdir" $ext_name -v ON_ERROR_STOP=1
+    alter extension $ext_name update to '$new_ver';
+EOF
+# * shut down the database
+sudo -u postgres "$PG_BINDIR/pg_ctl" stop -D  "$db" -m smart
+# * remove it
+rm -rf "$db"
+# * copy upgrade script files
+cp -f "$DEST_DIR/$ext_name--$old_ver--$new_ver.sql" "$new_ver_path/build/packaged/extension"
\ No newline at end of file
diff --git a/packages/pgvector.rb b/packages/pgvector.rb
new file mode 100644
index 0000000..4a988ba
--- /dev/null
+++ b/packages/pgvector.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+class Pgvector < Pgpm::Package
+  github "pgvector/pgvector"
+end
diff --git a/packages/plpgsql_check.rb b/packages/plpgsql_check.rb
new file mode 100644
index 0000000..013571b
--- /dev/null
+++ b/packages/plpgsql_check.rb
@@ -0,0 +1,34 @@
+# frozen_string_literal: true
+
+require "semver_dialects"
+
+class PlpgsqlCheck < Pgpm::Package
+  github "okbob/plpgsql_check"
+
+  def build_steps
+    if pg_config_hardcoded?
+      export_pg_config_to_path + super
+    else
+      super
+    end
+  end
+
+  def install_steps
+    if pg_config_hardcoded?
+      export_pg_config_to_path + super
+    else
+      super
+    end
+  end
+
+  private
+
+  def pg_config_hardcoded?
+    # https://github.com/okbob/plpgsql_check/pull/179
+    SemverDialects.parse_version("cargo", version) <= SemverDialects.parse_version("cargo", "2.7.11")
+  end
+
+  def export_pg_config_to_path
+    ["export PATH=$(dirname $PG_CONFIG):$PATH"]
+  end
+end
diff --git a/pgpm.gemspec b/pgpm.gemspec
new file mode 100644
index 0000000..858aceb
--- /dev/null
+++ b/pgpm.gemspec
@@ -0,0 +1,53 @@
+# frozen_string_literal: true
+
+require_relative "lib/pgpm/version"
+
+Gem::Specification.new do |spec|
+  spec.name = "pgpm"
+  spec.version = Pgpm::VERSION
+  spec.authors = ["Yurii Rashkovskii"]
+  spec.email = ["yrashk@gmail.com"]
+
+  spec.summary = "Postgres Package Manager"
+  spec.homepage = "https://postgres.pm"
+  spec.license = "MIT"
+  spec.required_ruby_version = ">= 3.3.0"
+
+  # spec.metadata["allowed_push_host"] = "TODO: Set to your gem server 'https://example.com'"
+
+  spec.metadata["homepage_uri"] = spec.homepage
+  spec.metadata["source_code_uri"] = "https://github.com/postgres-pm/postgres-om"
+  # spec.metadata["changelog_uri"] = "TODO: Put your gem's CHANGELOG.md URL here."
+
+  # Specify which files should be added to the gem when it is released.
+  # The `git ls-files -z` loads the files in the RubyGem that have been added into git.
+  gemspec = File.basename(__FILE__)
+  spec.files = IO.popen(%w[git ls-files -z], chdir: __dir__, err: IO::NULL) do |ls|
+    ls.readlines("\x0", chomp: true).reject do |f|
+      (f == gemspec) ||
+        f.start_with?(*%w[bin/ test/ spec/ features/ .git .github appveyor Gemfile])
+    end
+  end
+  spec.bindir = "exe"
+  spec.executables = spec.files.grep(%r{\Aexe/}) { |f| File.basename(f) }
+  spec.require_paths = ["lib"]
+
+  # Uncomment to register a new dependency of your gem
+  # spec.add_dependency "example-gem", "~> 1.0"
+
+  spec.add_dependency "dry-cli", "~> 1.1.0"
+  spec.add_dependency "dry-inflector", "~> 1.1.0"
+  spec.add_dependency "git", "~> 2.3.0"
+  spec.add_dependency "lspace", "~> 0.14"
+  spec.add_dependency "minitar", "~> 1.0.2"
+  spec.add_dependency "oj", "~> 3.16.6"
+  spec.add_dependency "parallel", "~> 1.26.3"
+  spec.add_dependency "progress", "~> 3.6.0"
+  spec.add_dependency "semver_dialects", "~> 3.4.3"
+  spec.add_dependency "xdg", "~> 8.7.0"
+  spec.add_dependency "zeitwerk", "~> 2.6.18"
+  spec.add_dependency "zlib", "~> 3.1.1"
+
+  # For more information and examples about making a new gem, check out our
+  # guide at: https://bundler.io/guides/creating_gem.html
+end
diff --git a/sig/pgpm.rbs b/sig/pgpm.rbs
new file mode 100644
index 0000000..8f93435
--- /dev/null
+++ b/sig/pgpm.rbs
@@ -0,0 +1,4 @@
+module Pgpm
+  VERSION: String
+  # See the writing guide of rbs: https://github.com/ruby/rbs#guides
+end
diff --git a/test/test_helper.rb b/test/test_helper.rb
new file mode 100644
index 0000000..7e5d850
--- /dev/null
+++ b/test/test_helper.rb
@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+require "pgpm"
+
+require "minitest/autorun"
diff --git a/test/test_pgpm.rb b/test/test_pgpm.rb
new file mode 100644
index 0000000..933450b
--- /dev/null
+++ b/test/test_pgpm.rb
@@ -0,0 +1,9 @@
+# frozen_string_literal: true
+
+require "test_helper"
+
+class TestPgpm < Minitest::Test
+  def test_that_it_has_a_version_number
+    refute_nil ::Pgpm::VERSION
+  end
+end