...

.github/workflows/flake-update.yml

@@ -4,7 +4,7 @@
     "workflow_dispatch": null,
     "schedule": [
       {
-        "cron": "0 0 * * *"
+        "cron": "0 10 * * *"
     }
   ]
 },

.github/workflows/nix-github-actions.yml

@@ -0,0 +1,36 @@
+name: Nix Flake actions
+
+on:
+  pull_request:
+  push:
+    branches:
+      - master
+      - main
+
+jobs:
+  nix-matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v4
+      - id: set-matrix
+        name: Generate Nix Matrix
+        run: |
+          set -Eeu
+          echo "matrix=$(nix eval --json '.#githubActions.matrix')" >> "$GITHUB_OUTPUT"
+
+  nix-build:
+    needs: nix-matrix
+    runs-on: ${{ matrix.os }}
+    strategy:
+      matrix: ${{fromJSON(needs.nix-matrix.outputs.matrix)}}
+    steps:
+      - uses: actions/checkout@v3
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v4
+      - name: Run Nix cache
+        uses: DeterminateSystems/magic-nix-cache-action@v1
+      - run: nix build -L ".#${{ matrix.attr }}"