phg: debug install with pip 4.1+

Author: Borda

.github/workflows/release-pypi.yml

@@ -20,13 +20,15 @@ jobs:
           python-version: 3.9
 
       - name: Install dependencies
-        run: pip install -U build twine
+        run: pip install -U build twine pip
       - name: Overview Readme for release
         run: echo "# Lit Models" > README.md
       - name: Build package
         run: python -m build
       - name: Check package
         run: twine check dist/*
+      - name: Install package
+        run: pip install dist/*.tar.gz
 
       # We do this, since failures on test.pypi aren't that bad
       - name: Publish to Test PyPI