diff --git a/.github/workflows/python.yml b/.github/workflows/python.yml
index 43899a3b..d02e338e 100644
--- a/.github/workflows/python.yml
+++ b/.github/workflows/python.yml
@@ -109,8 +109,8 @@ jobs:
       - name: 🛠️ Use VTK-Python Libs
         if: ${{ matrix.os == 'ubuntu-latest' }}
         run: |
-          sed -i 's/\(DVIENNALS_BUILD_PYTHON=ON"\)/\1,"-DVIENNALS_VTK_PYTHON_LIBS=ON"/g' pyproject.toml
-          # sed -i 's/\(DVIENNALS_BUILD_PYTHON=ON"\)/\1,"-DVIENNALS_PACKAGE_PYTHON=ON"/g' pyproject.toml
+          # sed -i 's/\(DVIENNALS_BUILD_PYTHON=ON"\)/\1,"-DVIENNALS_VTK_PYTHON_LIBS=ON"/g' pyproject.toml
+          sed -i 's/\(DVIENNALS_BUILD_PYTHON=ON"\)/\1,"-DVIENNALS_PACKAGE_PYTHON=ON", "-DVIENNALS_IS_CI=ON"/g' pyproject.toml
           cat pyproject.toml
 
       - name: 🏗️ Build Wheels
diff --git a/CMakeLists.txt b/CMakeLists.txt
index 7c67a5e2..182cc8a1 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -38,7 +38,10 @@ if(VIENNALS_PACKAGE_PYTHON)
       "[ViennaLS] Using remote VTK due to 'VIENNALS_PACKAGE_PYTHON', the build will take a long time!"
   )
 
-  set(CPM_DOWNLOAD_ALL ON)
+  if (NOT VIENNALS_IS_CI)
+    set(CPM_DOWNLOAD_ALL ON)
+  endif()
+
   set(VIENNALS_BUILD_PYTHON ON)
 endif()