diff --git a/.github/workflows/cachix-pusher.yml b/.github/workflows/cachix-pusher.yml
new file mode 100644
index 00000000..3a0d7797
--- /dev/null
+++ b/.github/workflows/cachix-pusher.yml
@@ -0,0 +1,21 @@
+name: "cachix-pusher"
+
+on:
+  push:
+    branches:
+      - 'master'
+    tags:
+      - '*'
+
+jobs:
+  push:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/checkout@v4
+    - uses: cachix/install-nix-action@v25
+      with:
+        nix_path: nixpkgs=channel:nixos-unstable
+    - uses: cachix/cachix-action@v14
+      with:
+        name: simula
+        signingKey: '${{ secrets.CACHIX_SIGNING_KEY }}'
diff --git a/.github/workflows/nix-checker.yml b/.github/workflows/nix-checker.yml
index e39f811c..68bdd4db 100644
--- a/.github/workflows/nix-checker.yml
+++ b/.github/workflows/nix-checker.yml
@@ -4,6 +4,7 @@ on:
   pull_request:
   push:
     tags:
+      - '*'
     branches:
       - 'main'
 
diff --git a/flake.nix b/flake.nix
index f2d5c27a..8d0d92bd 100644
--- a/flake.nix
+++ b/flake.nix
@@ -348,7 +348,12 @@
 
           treefmt = {
             projectRootFile = "project.godot";
+
+            # Nix
             programs.nixfmt.enable = true;
+
+            # GitHub Actions
+            programs.actionlint.enable = true;
           };
 
           packages = {