fixup

Author: PhilipVinc

.github/workflows/system.yml

@@ -74,7 +74,7 @@ jobs:
           show-versioninfo: true
       - name: Set PYTHON Env variable
         run: echo "PYTHON=python" >> $GITHUB_ENV
-        if: ${{ matrix.python-version != '2.7' }}
+        if: ${{ matrix.python-version == '2.7' }}
       - name: Install PyPreferences
         shell: julia --project=@. {0}
         run: |