fix(ci): make Test template initialization self-contained

Signed-off-by: Cameron Smith <cameron.ray.smith@gmail.com>

Author: cameronraysmith

.github/workflows/ci.yaml

@@ -196,16 +196,9 @@ jobs:
         uses: mxschmitt/action-tmate@e5c7151931ca95bad1c6f4190c730ecf8c7dde48 # ratchet:mxschmitt/action-tmate@v3
         if: ${{ needs.set-variables.outputs.debug == 'true' }}
 
-      # - name: Install omnix
-      #   run: nix --accept-flake-config profile install "github:juspay/omnix"
-
-      - name: Install uv
-        uses: astral-sh/setup-uv@f94ec6bedd8674c4426838e6b50417d36b6ab231 # ratchet:astral-sh/setup-uv@v5
-        with:
-          python-version: "3.12"
-          enable-cache: true
-          cache-dependency-glob: "uv.lock"
-          version: "0.6.4"
+      - name: Install omnix
+        # If we don't install omnix here, it will just clutter the log of the next step
+        run: nix --accept-flake-config profile install "github:juspay/omnix"
 
       - name: Test template initialization
         # This script executes the tl;dr one-liner from the README
@@ -236,9 +229,9 @@ jobs:
 
           # TODO: remove on resolution of https://github.com/juspay/omnix/issues/425
           nix run .#fix-template-names -- python-nix-template
-          # This needs to use the system uv (astral-sh/setup-uv) before entering
-          # the devshell
-          uv lock
+          # This needs to use a global uv (astral-sh/setup-uv) before entering
+          # the devshell even though uv is included in the devshell
+          nix run nixpkgs#uv -- lock
           git add .
 
           nix develop -c pytest