diff --git a/.builds/apu.yml b/.builds/apu.yml
deleted file mode 100644
index 0c201aa..0000000
--- a/.builds/apu.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-image: nixos/unstable
-environment:
-  NIX_CONFIG: "experimental-features = nix-command flakes"
-tasks:
-  - build: |
-      cd NixOS
-      nix build --dry-run '.#nixosConfigurations.apu.config.system.build.toplevel'
diff --git a/.builds/freun-dev.yml b/.builds/freun-dev.yml
deleted file mode 100644
index 7550470..0000000
--- a/.builds/freun-dev.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-image: nixos/unstable
-secrets:
-  - b6e73fc2-2ca4-4bb5-a3e6-6b868276e0ec
-environment:
-  NIX_CONFIG: |
-    experimental-features = nix-command flakes
-    builders = ssh://builder@freun.dev aarch64-linux /home/build/.ssh/b6e73fc2-2ca4-4bb5-a3e6-6b868276e0ec 8 - - - c3NoLWVkMjU1MTkgQUFBQUMzTnphQzFsWkRJMU5URTVBQUFBSUV2Q1NqSWppcG9nMVhmOW1QYzY4M3I1VlNHU2pWYzh2MVVaZzVWcmJieE0gcm9vdEBmcmV1bi1kZXYK
-    builders-use-substitutes = true
-
-tasks:
-  - build: |
-      ls -la ~/.ssh
-      cd NixOS
-      nix build --dry-run '.#nixosConfigurations.freun-dev.config.system.build.toplevel'
diff --git a/.builds/radish.yml b/.builds/radish.yml
deleted file mode 100644
index 8ba300f..0000000
--- a/.builds/radish.yml
+++ /dev/null
@@ -1,7 +0,0 @@
-image: nixos/unstable
-environment:
-  NIX_CONFIG: "experimental-features = nix-command flakes"
-tasks:
-  - build: |
-      cd NixOS
-      nix build --dry-run '.#nixosConfigurations.radish.config.system.build.toplevel'
diff --git a/.builds/turny.yml b/.builds/turny.yml
deleted file mode 100644
index 308ffad..0000000
--- a/.builds/turny.yml
+++ /dev/null
@@ -1,14 +0,0 @@
-image: nixos/unstable
-secrets:
-  - b6e73fc2-2ca4-4bb5-a3e6-6b868276e0ec
-environment:
-  NIX_CONFIG: |
-    experimental-features = nix-command flakes
-    builders = ssh://builder@freun.dev aarch64-linux /home/build/.ssh/b6e73fc2-2ca4-4bb5-a3e6-6b868276e0ec 8 - - - c3NoLWVkMjU1MTkgQUFBQUMzTnphQzFsWkRJMU5URTVBQUFBSUV2Q1NqSWppcG9nMVhmOW1QYzY4M3I1VlNHU2pWYzh2MVVaZzVWcmJieE0gcm9vdEBmcmV1bi1kZXYK
-    builders-use-substitutes = true
-
-tasks:
-  - build: |
-      ls -la ~/.ssh
-      cd NixOS
-      nix build --dry-run '.#nixosConfigurations.turny.config.system.build.toplevel'
diff --git a/.gitea/workflows/check.yml b/.gitea/workflows/check.yml
new file mode 100644
index 0000000..e62a05c
--- /dev/null
+++ b/.gitea/workflows/check.yml
@@ -0,0 +1,20 @@
+name: Check
+
+on:
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
+
+jobs:
+  build:
+    runs-on: nixos-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v6
+
+      - name: Check
+        run: nix flake check
+        env:
+          NIX_CONFIG: "experimental-features = nix-command flakes"
diff --git a/hosts/freun-dev/services.nix b/hosts/freun-dev/services.nix
index 32597f0..cd813a3 100644
--- a/hosts/freun-dev/services.nix
+++ b/hosts/freun-dev/services.nix
@@ -450,7 +450,8 @@ in
         name = config.networking.domain;
         labels = [
           "linux_arm64"
-          "ubuntu-latest:docker://node:16-bullseye"
+          "ubuntu-latest:docker://node:latest"
+          "nixos-latest:docker://nixos/nix:latest"
         ];
         tokenFile = secrets.gitea-actions-runner.path;
         url = "https://${config.services.gitea.subdomain}.${config.networking.domain}";