From a0eea48abba77915ee8127e3fe22eaa9e7f7dc16 Mon Sep 17 00:00:00 2001
From: Assil Ksiksi <cyph0nik@gmail.com>
Date: Tue, 7 Nov 2023 09:41:56 -0500
Subject: [PATCH] use runCommandLocal

---
 flake.nix | 15 ++++++++++-----
 1 file changed, 10 insertions(+), 5 deletions(-)

diff --git a/flake.nix b/flake.nix
index 51b512d..3d87268 100644
--- a/flake.nix
+++ b/flake.nix
@@ -1,8 +1,8 @@
 # References:
 # https://blog.lenny.ninja/part-1-quickly-packaging-services-using-nix-flakes.html
 # https://ayats.org/blog/no-flake-utils/
-# https://ryantm.github.io/nixpkgs/builders/trivial-builders/#trivial-builder-runCommand
-# https://nixpkgs-manual-sphinx-markedown-example.netlify.app/development/writing-modules.xml.html#structure-of-nixos-modules
+# https://nixos.org/manual/nixos/stable/#sec-writing-modules
+# https://nixos.org/manual/nixpkgs/stable/#ssec-language-go
 {
   description = "minimal configuration for compose2nix";
 
@@ -44,6 +44,7 @@
           # https://nixos.org/manual/nixos/stable/#sec-option-declarations
           paths = mkOption {
             type = types.listOf types.path;
+            default = [];
             description = lib.mdDoc "One or more paths to Docker Compose files.";
           };
           runtime = mkOption {
@@ -87,11 +88,15 @@
             description = lib.mdDoc "Auto-start all containers.";
           };
         };
-        configs = mkIf (cfg.paths != []) {
+        config = mkIf (cfg.paths != []) {
           compose2nix = {
-            output = pkgs.runCommand "run-compose2nix" {
-              buildInputs = [ pkgs.compose2nix ];
+            # runCommandLocal ensures that we always build this derivation on the local machine.
+            # This allows us to circumvent the Nix binary cache and minimize the time spent outside
+            # of building the derivation.
+            # https://nixos.org/manual/nixpkgs/stable/#trivial-builder-runCommandLocal
+            output = pkgs.runCommandLocal "run-compose2nix" {
               env = cfg.env;
+              buildInputs = [ pkgs.compose2nix ];
             } ''
               ${pkgs.compose2nix}/bin/compose2nix \
                 -paths='${concatStringsSep "," cfg.paths}' \