Move flake_regressions into its own file

.github/workflows/ci.yml

@@ -208,23 +208,3 @@ jobs:
       # Only meson packages that don't have a tests.run derivation.
       # Those that have it are already built and tested as part of nix flake check.
       - run: nix build -L .#hydraJobs.build.{nix-cmd,nix-main}.$(nix-instantiate --eval --expr builtins.currentSystem | sed -e 's/"//g')
-
-  flake_regressions:
-    needs: vm_tests
-    runs-on: ubuntu-22.04
-    steps:
-      - name: Checkout nix
-        uses: actions/checkout@v4
-      - name: Checkout flake-regressions
-        uses: actions/checkout@v4
-        with:
-          repository: NixOS/flake-regressions
-          path: flake-regressions
-      - name: Checkout flake-regressions-data
-        uses: actions/checkout@v4
-        with:
-          repository: NixOS/flake-regressions-data
-          path: flake-regressions/tests
-      - uses: DeterminateSystems/nix-installer-action@main
-      - uses: DeterminateSystems/magic-nix-cache-action@main
-      - run: nix build --out-link ./new-nix && PATH=$(pwd)/new-nix/bin:$PATH scripts/flake-regressions.sh

.github/workflows/flake_regressions.yml

@@ -0,0 +1,29 @@
+name: "CI"
+
+on:
+  pull_request:
+  push:
+
+permissions: read-all
+
+jobs:
+
+  flake_regressions:
+    needs: vm_tests
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout nix
+        uses: actions/checkout@v4
+      - name: Checkout flake-regressions
+        uses: actions/checkout@v4
+        with:
+          repository: NixOS/flake-regressions
+          path: flake-regressions
+      - name: Checkout flake-regressions-data
+        uses: actions/checkout@v4
+        with:
+          repository: NixOS/flake-regressions-data
+          path: flake-regressions/tests
+      - uses: DeterminateSystems/nix-installer-action@main
+      - uses: DeterminateSystems/magic-nix-cache-action@main
+      - run: nix build --out-link ./new-nix && PATH=$(pwd)/new-nix/bin:$PATH scripts/flake-regressions.sh