Ouch!

Author: DimitriPapadopoulos

.github/workflows/ci.yaml

@@ -57,7 +57,6 @@ jobs:
           echo "MESON_SETUP_ARGS=-Dc_args=-I${PY_INC} -Dc_link_args=-L${CONDA_PREFIX}/lib" >> $GITHUB_ENV
 
       - name: Install numcodecs
-        if: startsWith(matrix.platform, 'ubuntu')
         run: |
           if [[ "${{ startsWith(matrix.platform, 'ubuntu') }}" == "true" ]]; then
             # TODO: Remove this conditional when pcodec supports Python 3.14
@@ -133,12 +132,31 @@ jobs:
       - name: Install compilers
         run: conda install -y c-compiler cxx-compiler
 
+      - name: Meson args - use active Python include/lib (Ubuntu)
+        if: startsWith(matrix.platform, 'ubuntu')
+        run: |
+          PY_INC=$(python -c "import sysconfig; print(sysconfig.get_config_var('INCLUDEPY'))")
+          echo "PY_INC=$PY_INC" >> $GITHUB_ENV
+          echo "MESON_SETUP_ARGS=-Dc_args=-I${PY_INC} -Dc_link_args=-L${CONDA_PREFIX}/lib" >> $GITHUB_ENV
+
       - name: Install numcodecs
         run: |
-          if [[ -n "${{ matrix.extras }}" ]]; then
-            python -m pip install -v ".[${{ matrix.extras }},test]"
+          if [[ "${{ startsWith(matrix.platform, 'ubuntu') }}" == "true" ]]; then
+            if [[ -n "${{ matrix.extras }}" ]]; then
+              python -m pip install -v \
+                --config-settings="setup-args=${MESON_SETUP_ARGS}" \
+                ".[${{ matrix.extras }},test]"
+            else
+              python -m pip install -v \
+                --config-settings="setup-args=${MESON_SETUP_ARGS}" \
+                ".[test]"
+            fi
           else
-            python -m pip install -v ".[test]"
+            if [[ -n "${{ matrix.extras }}" ]]; then
+              python -m pip install -v ".[${{ matrix.extras }},test]"
+            else
+              python -m pip install -v ".[test]"
+            fi
           fi
 
       - name: List installed packages
@@ -189,9 +207,22 @@ jobs:
       - name: Install compilers
         run: conda install -y c-compiler cxx-compiler
 
+      - name: Meson args - use active Python include/lib (Ubuntu)
+        if: startsWith(matrix.platform, 'ubuntu')
+        run: |
+          PY_INC=$(python -c "import sysconfig; print(sysconfig.get_config_var('INCLUDEPY'))")
+          echo "PY_INC=$PY_INC" >> $GITHUB_ENV
+          echo "MESON_SETUP_ARGS=-Dc_args=-I${PY_INC} -Dc_link_args=-L${CONDA_PREFIX}/lib" >> $GITHUB_ENV
+
       - name: Install numcodecs and Zarr
         run: |
-          python -m pip install -v ".[test,test_extras]" "${{ matrix.zarr-pkg }}" crc32c
+          if [[ "${{ startsWith(matrix.platform, 'ubuntu') }}" == "true" ]]; then
+            python -m pip install -v \
+              --config-settings="setup-args=${MESON_SETUP_ARGS}" \
+              ".[test,test_extras]" "${{ matrix.zarr-pkg }}" crc32c
+          else
+            python -m pip install -v ".[test,test_extras]" "${{ matrix.zarr-pkg }}" crc32c
+          fi
       - name: List installed packages
         run: python -m pip list