testing dev shell for python pytest

.github/workflows/pytest.yml

@@ -16,4 +16,4 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Run tests
-        run: pytest tests
+        run: nix develop .#devShells.x86_64-linux.default -c pytest tests

flake.nix

@@ -59,6 +59,7 @@
         system:
         import nixpkgs {
           inherit system;
+          overlays = builtins.attrValues outputs.overlays;
           config.allowUnfree = true;
         }
       );

shell.nix

@@ -9,6 +9,7 @@
       nix
       home-manager
       git
+      my_python
 
       ssh-to-age
       gnupg