Use Conda Python headers

Author: DimitriPapadopoulos

.github/workflows/ci.yaml

@@ -41,6 +41,14 @@ jobs:
         if: matrix.platform == 'macos-15-large'
         run: conda install -y 'clang>=12.0.1,<17'
 
+      - name: Prefer Conda Python headers (Ubuntu)
+        if: startsWith(matrix.platform, 'ubuntu')
+        run: |
+          python -c "import sys, sysconfig; print(sys.executable); print(sys.version); print('INCLUDEPY=', sysconfig.get_config_var('INCLUDEPY'))"
+          echo "CPPFLAGS=-I${CONDA_PREFIX}/include" >> $GITHUB_ENV
+          echo "CFLAGS=-I${CONDA_PREFIX}/include" >> $GITHUB_ENV
+          echo "LDFLAGS=-L${CONDA_PREFIX}/lib" >> $GITHUB_ENV
+
       - name: Show conda environment info
         run: |
           conda info