try fix `Python 3.12 + "AttributeError: module ‘pkgutil’ has no attri…

…bute ‘ImpImporter’. Did you mean: ‘zipimporter’?"

Signed-off-by: Jan Kowalleck <jan.kowalleck@gmail.com>

.github/workflows/python.yml

@@ -84,6 +84,8 @@ jobs:
           - # test with the lowest dependencies
             python-version: '3.7'
             toxenv-factor: 'lowest'
+    env:
+      VIRTUALENV_DOWNLOAD: ${{ matrix.python-version == '3.12' }}
     steps:
       - name: Checkout
         # see https://github.com/actions/checkout
@@ -112,8 +114,6 @@ jobs:
     name: Test (${{ matrix.os }} py${{ matrix.python-version }} ${{ matrix.toxenv-factor }})
     runs-on: ${{ matrix.os }}
     timeout-minutes: 10
-    env:
-      REPORTS_ARTIFACT: tests-reports
     strategy:
       fail-fast: false
       matrix:
@@ -131,6 +131,9 @@ jobs:
             os: 'ubuntu-latest'
             python-version: '3.7'
             toxenv-factor: 'lowest'
+    env:
+      REPORTS_ARTIFACT: tests-reports
+      VIRTUALENV_DOWNLOAD: ${{ matrix.python-version == '3.12' }}
     steps:
       - name: Checkout
         # see https://github.com/actions/checkout