Avoid getting contaminated by pkg-config's absolute paths.

Author: Maxwell175

.github/workflows/main.yml

@@ -25,7 +25,7 @@ jobs:
     - name: Run Build
       run: bash build.mac.sh "${{ github.workspace }}/Nuitka-Python-Out"
     - name: Cleanup artifact
-      run: find "${{ github.workspace }}/Nuitka-Python-Out" \( -iname '*.o' -o -iname '__pycache__' -o -iname 'link.json' \) | xargs rm -rf
+      run: find "${{ github.workspace }}/Nuitka-Python-Out" \( -iname '*.o' -iname '*.pc' -o -iname '__pycache__' -o -iname 'link.json' \) | xargs rm -rf
     - uses: actions/upload-artifact@v4
       with:
         name: Nuitka-Python311_mac_arm64

Lib/pip.py

@@ -252,6 +252,10 @@ def main():
     if platform.system() == "Darwin":
         os.environ["MACOSX_DEPLOYMENT_TARGET"] = "10.9"
 
+    # pkg-config uses absolute paths, which do not allow for
+    if platform.system() != "Windows":
+        os.environ["PKG_CONFIG"] = "/disabled"
+
     import site
 
     for path in site.getsitepackages():