diff --git a/conda_build_config.yaml b/.conda/conda_build_config.yaml
similarity index 100%
rename from conda_build_config.yaml
rename to .conda/conda_build_config.yaml
diff --git a/.conda/meta.yaml b/.conda/meta.yaml
index abec48667..a40d6ceba 100644
--- a/.conda/meta.yaml
+++ b/.conda/meta.yaml
@@ -27,6 +27,7 @@ requirements:
     - python
     - pip
   run:
+    - numpy
     {% for req in data.get('install_requires', []) %}
     - {{ req }}
     {% endfor %}
@@ -63,7 +64,8 @@ outputs:
       host:
         - python
       run:
-        - python >=3.9,<4.0
+        - python
+        - numpy
         {% for req in data.get('api_requirements', []) %}
         - {{ req }}
         {% endfor %}
@@ -81,7 +83,8 @@ outputs:
       host:
         - python
       run:
-        - python >=3.9,<4.0
+        - python
+        - numpy
         {% for req in data.get('dev_requirements', []) %}
         - {{ req }}
         {% endfor %}
diff --git a/.github/workflows/_before-conda.yaml b/.github/workflows/_before-conda.yaml
index 194295279..b84e5c482 100644
--- a/.github/workflows/_before-conda.yaml
+++ b/.github/workflows/_before-conda.yaml
@@ -20,9 +20,9 @@ defaults:
     shell: bash -l {0}
 
 jobs:
-  setup-conda:
+  setup:
     runs-on: ${{ inputs.os }}
-    name: setup-conda-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
+    name: conda-setup-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
     env:
       # To colorize output of make tasks.
       TERM: xterm-256color
@@ -99,7 +99,6 @@ jobs:
         mkdir -p ~/conda-rel
         conda build \
           .conda \
-          --use-local \
           --build-only \
           --croot ~/conda-bld \
           --cache-dir ~/conda-cache \
diff --git a/.github/workflows/_before.yaml b/.github/workflows/_before-pip.yaml
similarity index 67%
rename from .github/workflows/_before.yaml
rename to .github/workflows/_before-pip.yaml
index 1aab3a6c5..02554419c 100644
--- a/.github/workflows/_before.yaml
+++ b/.github/workflows/_before-pip.yaml
@@ -22,7 +22,7 @@ on:
 jobs:
   deps:
     runs-on: ${{ inputs.os }}
-    name: deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
+    name: pip-deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
     env:
       # To colorize output of make tasks.
       TERM: xterm-256color
@@ -45,8 +45,8 @@ jobs:
       uses: actions/cache@v4
       with:
         path: venv
-        key: deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}
-        restore-keys: deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-
+        key: pip-deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}
+        restore-keys: pip-deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-
 
     - name: Install dependencies
       run: |
@@ -58,7 +58,7 @@ jobs:
   build:
     runs-on: ${{ inputs.os }}
     needs: [deps]
-    name: build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
+    name: pip-build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
     env:
       TERM: xterm-256color
 
@@ -80,22 +80,22 @@ jobs:
       uses: actions/cache@v4
       with:
         path: venv
-        key: deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}
+        key: pip-deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}
 
     - name: Cache build
       uses: actions/cache@v4
       with:
         path: venv/**/[Oo]pen[Ff]isca*
-        key: build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}-${{ github.sha }}
+        key: pip-build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}-${{ github.sha }}
         restore-keys: |
-          build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}-
-          build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-
+          pip-build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}-
+          pip-build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-
 
     - name: Cache release
       uses: actions/cache@v4
       with:
         path: dist
-        key: release-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}-${{ github.sha }}
+        key: pip-release-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}-${{ github.sha }}
 
     - name: Build package
       run: |
diff --git a/.github/workflows/_lint.yaml b/.github/workflows/_lint-pip.yaml
similarity index 86%
rename from .github/workflows/_lint.yaml
rename to .github/workflows/_lint-pip.yaml
index ea7411e67..e994f473e 100644
--- a/.github/workflows/_lint.yaml
+++ b/.github/workflows/_lint-pip.yaml
@@ -22,7 +22,7 @@ on:
 jobs:
   lint:
     runs-on: ${{ inputs.os }}
-    name: lint-doc-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
+    name: pip-lint-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
     env:
       TERM: xterm-256color  # To colorize output of make tasks.
 
@@ -44,7 +44,7 @@ jobs:
       uses: actions/cache@v4
       with:
         path: venv
-        key: deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}
+        key: pip-deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}
 
     - name: Lint doc
       run: |
diff --git a/.github/workflows/_test-conda.yaml b/.github/workflows/_test-conda.yaml
new file mode 100644
index 000000000..0daa437fa
--- /dev/null
+++ b/.github/workflows/_test-conda.yaml
@@ -0,0 +1,45 @@
+name: Test conda package
+
+on:
+  workflow_call:
+    inputs:
+      os:
+        required: true
+        type: string
+
+      numpy:
+        required: true
+        type: string
+
+      python:
+        required: true
+        type: string
+
+defaults:
+  run:
+    shell: bash -l {0}
+
+jobs:
+  test:
+    runs-on: ${{ inputs.os }}
+    name: conda-test-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
+    env:
+      TERM: xterm-256color  # To colorize output of make tasks.
+
+    steps:
+    - name: Checkout
+      uses: actions/checkout@v4
+
+    - name: Install OpenFisca-Core
+      run: conda install --use-local --name openfisca openfisca-core-dev
+
+    - name: Run OpenFisca-Core tests
+      run: make test-core
+
+    - name: Run Country Template tests
+      if: ${{ startsWith(inputs.os, 'ubuntu') }}
+      run: make test-country
+
+    - name: Run Extension Template tests
+      if: ${{ startsWith(inputs.os, 'ubuntu') }}
+      run: make test-extension
diff --git a/.github/workflows/_test.yaml b/.github/workflows/_test-pip.yaml
similarity index 82%
rename from .github/workflows/_test.yaml
rename to .github/workflows/_test-pip.yaml
index 7133ff8c3..704c7fbd1 100644
--- a/.github/workflows/_test.yaml
+++ b/.github/workflows/_test-pip.yaml
@@ -22,7 +22,7 @@ on:
 jobs:
   test:
     runs-on: ${{ inputs.os }}
-    name: test-core-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
+    name: pip-test-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}
     env:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       TERM: xterm-256color  # To colorize output of make tasks.
@@ -45,13 +45,13 @@ jobs:
       uses: actions/cache@v4
       with:
         path: venv
-        key: deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}
+        key: pip-deps-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}
 
     - name: Cache build
       uses: actions/cache@v4
       with:
         path: venv/**/[Oo]pen[Ff]isca*
-        key: build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}-${{ github.sha }}
+        key: pip-build-${{ inputs.os }}-np${{ inputs.numpy }}-py${{ inputs.python }}-${{ hashFiles('setup.py') }}-${{ github.sha }}
 
     - name: Run Openfisca Core tests
       run: |
diff --git a/.github/workflows/merge.yaml b/.github/workflows/merge.yaml
index cb66e6247..d44ffce0f 100644
--- a/.github/workflows/merge.yaml
+++ b/.github/workflows/merge.yaml
@@ -9,7 +9,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  setup:
+  setup-pip:
     strategy:
       fail-fast: true
       matrix:
@@ -25,15 +25,22 @@ jobs:
           activate_command: source venv/bin/activate
         - os: windows-2019
           activate_command: .\venv\Scripts\activate
-    uses: ./.github/workflows/_before.yaml
+    uses: ./.github/workflows/_before-pip.yaml
     with:
       os: ${{ matrix.os }}
       numpy: ${{ matrix.numpy }}
       python: ${{ matrix.python }}
       activate_command: ${{ matrix.activate_command }}
 
-  test:
-    needs: [setup]
+  setup-conda:
+    uses: ./.github/workflows/_before-conda.yaml
+    with:
+      os: ubuntu-22.04
+      numpy: 1.26.4
+      python: 3.10.6
+
+  test-pip:
+    needs: [setup-pip]
     strategy:
       fail-fast: true
       matrix:
@@ -45,21 +52,29 @@ jobs:
           activate_command: source venv/bin/activate
         - os: windows-2019
           activate_command: .\venv\Scripts\activate
-    uses: ./.github/workflows/_test.yaml
+    uses: ./.github/workflows/_test-pip.yaml
     with:
       os: ${{ matrix.os }}
       numpy: ${{ matrix.numpy }}
       python: ${{ matrix.python }}
       activate_command: ${{ matrix.activate_command }}
 
-  lint:
-    needs: [setup]
+  test-conda:
+    uses: ./.github/workflows/_test-conda.yaml
+    needs: [setup-conda]
+    with:
+      os: ubuntu-22.04
+      numpy: 1.26.4
+      python: 3.10.6
+
+  lint-pip:
+    needs: [setup-pip]
     strategy:
       fail-fast: true
       matrix:
         numpy: [1.24.2]
         python: [3.11.9, 3.9.13]
-    uses: ./.github/workflows/_lint.yaml
+    uses: ./.github/workflows/_lint-pip.yaml
     with:
       os: ubuntu-22.04
       numpy: ${{ matrix.numpy }}
@@ -67,7 +82,7 @@ jobs:
       activate_command: source venv/bin/activate
 
   check-version:
-    needs: [test, lint]
+    needs: [test-pip, test-conda, lint-pip]
     uses: ./.github/workflows/_version.yaml
     with:
       os: ubuntu-22.04
@@ -126,21 +141,19 @@ jobs:
       uses: actions/cache@v4
       with:
         path: venv
-        key: deps-ubuntu-22.04-np1.24.2-py3.9.13-${{ hashFiles('setup.py') }}
+        key: pip-deps-ubuntu-22.04-np1.24.2-py3.9.13-${{ hashFiles('setup.py') }}
 
     - name: Cache build
       uses: actions/cache@v4
       with:
         path: venv/**/[oO]pen[fF]isca*
-        key: build-ubuntu-22.04-np1.24.2-py3.9.13-${{ hashFiles('setup.py') }}-${{
-          github.sha }}
+        key: pip-build-ubuntu-22.04-np1.24.2-py3.9.13-${{ hashFiles('setup.py') }}-${{ github.sha }}
 
     - name: Cache release
       uses: actions/cache@v4
       with:
         path: dist
-        key: release-ubuntu-22.04-np1.24.2-py3.9.13-${{ hashFiles('setup.py') }}-${{
-          github.sha }}
+        key: pip-release-ubuntu-22.04-np1.24.2-py3.9.13-${{ hashFiles('setup.py') }}-${{ github.sha }}
 
     - name: Upload package to PyPi
       run: |
diff --git a/.github/workflows/push.yaml b/.github/workflows/push.yaml
index 9699bd39e..2a8fbdef7 100644
--- a/.github/workflows/push.yaml
+++ b/.github/workflows/push.yaml
@@ -9,7 +9,7 @@ concurrency:
   cancel-in-progress: true
 
 jobs:
-  setup:
+  setup-pip:
     strategy:
       fail-fast: true
       matrix:
@@ -25,7 +25,7 @@ jobs:
           activate_command: source venv/bin/activate
         - os: windows-2019
           activate_command: .\venv\Scripts\activate
-    uses: ./.github/workflows/_before.yaml
+    uses: ./.github/workflows/_before-pip.yaml
     with:
       os: ${{ matrix.os }}
       numpy: ${{ matrix.numpy }}
@@ -39,8 +39,8 @@ jobs:
       numpy: 1.26.4
       python: 3.10.6
 
-  test:
-    needs: [setup]
+  test-pip:
+    needs: [setup-pip]
     strategy:
       fail-fast: true
       matrix:
@@ -52,21 +52,29 @@ jobs:
           activate_command: source venv/bin/activate
         - os: windows-2019
           activate_command: .\venv\Scripts\activate
-    uses: ./.github/workflows/_test.yaml
+    uses: ./.github/workflows/_test-pip.yaml
     with:
       os: ${{ matrix.os }}
       numpy: ${{ matrix.numpy }}
       python: ${{ matrix.python }}
       activate_command: ${{ matrix.activate_command }}
 
-  lint:
-    needs: [setup]
+  test-conda:
+    uses: ./.github/workflows/_test-conda.yaml
+    needs: [setup-conda]
+    with:
+      os: ubuntu-22.04
+      numpy: 1.26.4
+      python: 3.10.6
+
+  lint-pip:
+    needs: [setup-pip]
     strategy:
       fail-fast: true
       matrix:
         numpy: [1.24.2]
         python: [3.11.9, 3.9.13]
-    uses: ./.github/workflows/_lint.yaml
+    uses: ./.github/workflows/_lint-pip.yaml
     with:
       os: ubuntu-22.04
       numpy: ${{ matrix.numpy }}
@@ -74,7 +82,7 @@ jobs:
       activate_command: source venv/bin/activate
 
   check-version:
-    needs: [test, lint, setup-conda]
+    needs: [test-pip, test-conda, lint-pip]
     uses: ./.github/workflows/_version.yaml
     with:
       os: ubuntu-22.04