diff --git a/pre-commit.sh b/pre-commit.sh
new file mode 100755
index 0000000..5e3479f
--- /dev/null
+++ b/pre-commit.sh
@@ -0,0 +1,5 @@
+#!/usr/bin/env -S nix shell --quiet nixpkgs#bash nixpkgs#nixpkgs-fmt --ignore-environment --command bash
+
+# Install: ln -s ../../pre-commit.sh .git/hooks/pre-commit
+
+nixpkgs-fmt --check .