diff --git a/.forgejo/workflows/demo.yml b/.forgejo/workflows/demo.yml.bak
similarity index 100%
rename from .forgejo/workflows/demo.yml
rename to .forgejo/workflows/demo.yml.bak
diff --git a/.forgejo/workflows/flake-check.yml b/.forgejo/workflows/flake-check.yml
new file mode 100644
index 0000000..5a98f02
--- /dev/null
+++ b/.forgejo/workflows/flake-check.yml
@@ -0,0 +1,14 @@
+---
+on: push
+jobs:
+  nix_build:
+    name: Build Nix targets
+    runs-on: ubuntu-22.04
+    steps:
+      - uses: actions/checkout@v3
+      - name: Check Nix flake inputs
+        uses: DeterminateSystems/flake-checker-action@v5
+      - name: Install Nix
+        uses: DeterminateSystems/nix-installer-action@v4
+      - name: Build Nix package
+        run: nix build