diff --git a/third_party/gitignoreSource/default.nix b/third_party/gitignoreSource/default.nix
new file mode 100644
index 000000000..d9d026244
--- /dev/null
+++ b/third_party/gitignoreSource/default.nix
@@ -0,0 +1,8 @@
+{ pkgs, ... }:
+
+(import (pkgs.fetchFromGitHub {
+  owner = "hercules-ci";
+  repo = "gitignore";
+  rev = "f9e996052b5af4032fe6150bba4a6fe4f7b9d698";
+  sha256 = "0jrh5ghisaqdd0vldbywags20m2cxpkbbk5jjjmwaw0gr8nhsafv";
+}) { inherit (pkgs) lib; }).gitignoreSource