maybe this would work

Author: Joey Jurjens

.github/workflows/ci.yml

@@ -48,10 +48,9 @@ jobs:
           python-version: ${{ matrix.python-version }}
       - name: Install all dependencies
         run: |
-          pip install -e .[dev]
           make install
-          pip install "django~=${{ matrix.django-version }}.0"
-          pip install "django-oscar~=${{ matrix.oscar-version }}.0"
+          pip install "django~=${{ matrix.django-version }}"
+          pip install "django-oscar~=${{ matrix.oscar-version }}"
       - name: Show all versions
         run: pip list
       - name: Run the testsuite