diff --git a/.github/workflows/build-checks.yml b/.github/workflows/build-checks.yml
new file mode 100644
index 0000000..3d31c5f
--- /dev/null
+++ b/.github/workflows/build-checks.yml
@@ -0,0 +1,43 @@
+name: "Nix flake checks"
+
+on:
+  pull_request:
+  push:
+
+permissions:
+  contents: read
+
+jobs:
+  nix-matrix:
+    runs-on: ubuntu-latest
+    outputs:
+      matrix: ${{ steps.set-matrix.outputs.matrix }}
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+      - uses: cachix/install-nix-action@3715ab1a11cac9e991980d7b4a28d80c7ebdd8f9 # v27
+      - id: set-matrix
+        name: Generate Nix checks matrix
+        run: |
+          set -Eeu
+          matrix="$(nix eval --json '.#githubActions.matrix')"
+          echo "matrix=$matrix" >> "$GITHUB_OUTPUT"
+
+  nix-build:
+    name: ${{ matrix.name }} (${{ matrix.system }})
+    needs: nix-matrix
+    runs-on: ${{ matrix.os }}
+    env:
+      CHECK_ATTR: ${{ matrix.attr }}
+    strategy:
+      matrix: ${{fromJSON(needs.nix-matrix.outputs.matrix)}}
+    steps:
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        with:
+          persist-credentials: false
+      - uses: cachix/install-nix-action@3715ab1a11cac9e991980d7b4a28d80c7ebdd8f9 # v27
+      - uses: DeterminateSystems/magic-nix-cache-action@87b14cf437d03d37989d87f0fa5ce4f5dc1a330b # v8
+        with:
+          diagnostic-endpoint: ""
+      - run: nix build -L ".#${CHECK_ATTR}"
diff --git a/flake.lock b/flake.lock
index 34d1452..5083064 100644
--- a/flake.lock
+++ b/flake.lock
@@ -100,6 +100,26 @@
       }
     },
     "nix-github-actions": {
+      "inputs": {
+        "nixpkgs": [
+          "nixpkgs"
+        ]
+      },
+      "locked": {
+        "lastModified": 1731952509,
+        "narHash": "sha256-p4gB3Rhw8R6Ak4eMl8pqjCPOLCZRqaehZxdZ/mbFClM=",
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "rev": "7b5f051df789b6b20d259924d349a9ba3319b226",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-community",
+        "repo": "nix-github-actions",
+        "type": "github"
+      }
+    },
+    "nix-github-actions_2": {
       "inputs": {
         "nixpkgs": [
           "poetry2nix",
@@ -120,7 +140,7 @@
         "type": "github"
       }
     },
-    "nix-github-actions_2": {
+    "nix-github-actions_3": {
       "inputs": {
         "nixpkgs": [
           "sphinxcontrib-nixdomain",
@@ -161,7 +181,7 @@
     "poetry2nix": {
       "inputs": {
         "flake-utils": "flake-utils_3",
-        "nix-github-actions": "nix-github-actions",
+        "nix-github-actions": "nix-github-actions_2",
         "nixpkgs": [
           "nixpkgs"
         ],
@@ -185,7 +205,7 @@
     "pyproject-nix": {
       "inputs": {
         "mdbook-nixdoc": "mdbook-nixdoc",
-        "nix-github-actions": "nix-github-actions_2",
+        "nix-github-actions": "nix-github-actions_3",
         "nixpkgs": [
           "sphinxcontrib-nixdomain",
           "nixpkgs"
@@ -209,6 +229,7 @@
       "inputs": {
         "bash-lib": "bash-lib",
         "flake-utils": "flake-utils_2",
+        "nix-github-actions": "nix-github-actions",
         "nixpkgs": "nixpkgs",
         "poetry2nix": "poetry2nix",
         "sphinxcontrib-nixdomain": "sphinxcontrib-nixdomain"
diff --git a/flake.nix b/flake.nix
index 7ecdb45..bb3ab07 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,12 +16,17 @@
       url = "github:minijackson/sphinxcontrib-nixdomain";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    nix-github-actions = {
+      url = "github:nix-community/nix-github-actions";
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
   };
 
   outputs = {
     self,
     flake-utils,
     nixpkgs,
+    nix-github-actions,
     ...
   } @ inputs: let
     overlay = import ./pkgs self.lib inputs;
@@ -129,5 +134,7 @@
       defaultTemplate = self.templates.default;
 
       formatter.x86_64-linux = nixpkgs.legacyPackages.x86_64-linux.alejandra;
+
+      githubActions = nix-github-actions.lib.mkGithubMatrix {inherit (self) checks;};
     };
 }