fix ci for pipenv

.github/workflows/e2e-cache.yml

@@ -42,16 +42,19 @@ jobs:
         python-version: ['3.7', '3.8', '3.9', 'pypy-3.7-v7.3.5', 'pypy-3.7-v7.x']
     steps:
       - uses: actions/checkout@v2
-      - name: Install pipenv
-        run: pipx install pipenv
       - name: Setup Python
         uses: ./
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'pipenv'
+      - run: pip install --user pipenv
       - name: Install dependencies
-        run: pipenv install flake8
-
+        shell: pwsh
+        run: |
+          if ($IsMacOS) {
+            $env:PATH += ":/Users/runner/.local/bin"
+          }
+          pipenv install flake8
   python-pip-dependencies-caching-path:
     name: Test pip (Python ${{ matrix.python-version}}, ${{ matrix.os }})
     runs-on: ${{ matrix.os }}
@@ -81,13 +84,17 @@ jobs:
         python-version: ['3.7', '3.8', '3.9', 'pypy-3.7-v7.3.5', 'pypy-3.7-v7.x']
     steps:
       - uses: actions/checkout@v2
-      - name: Install pipenv
-        run: pipx install pipenv
       - name: Setup Python
         uses: ./
         with:
           python-version: ${{ matrix.python-version }}
           cache: 'pipenv'
           cache-dependency-path: '**/requirements-linux.txt'
+      - run: pip install --user pipenv
       - name: Install dependencies
-        run: pipenv install flake8
+        shell: pwsh
+        run: |
+          if ($IsMacOS) {
+            $env:PATH += ":/Users/runner/.local/bin"
+          }
+          pipenv install flake8