Next try

Author: ufechner7

.github/workflows/CI.yml

@@ -35,7 +35,13 @@ jobs:
     steps:
       - name: Install matplotlib
         run: |
-          sudo apt-get install -y python3-matplotlib
+          if [ "$RUNNER_OS" = "Linux" ]; then
+            sudo apt-get update
+            sudo apt-get install -y python3-matplotlib
+          fi
+        shell: bash
+      - name: Build PyCall
+        run: julia --project -e 'ENV["PYTHON"]=""; using Pkg; Pkg.instantiate(); Pkg.add("PyCall"); Pkg.build("PyCall")'
         shell: bash
       - uses: actions/checkout@v6
       - uses: julia-actions/setup-julia@v2