diff --git a/.gitignore b/.gitignore
index f990862..c858907 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1 +1,2 @@
 /git-repo-updater
+/result
diff --git a/flake-modules/packages.nix b/flake-modules/packages.nix
new file mode 100644
index 0000000..6a2cb36
--- /dev/null
+++ b/flake-modules/packages.nix
@@ -0,0 +1,11 @@
+{
+  perSystem =
+    { pkgs, ... }:
+    {
+      packages.default = pkgs.buildGoModule {
+        name = "git-repo-updater";
+        src = ../.;
+        vendorHash = "sha256-g+yaVIx4jxpAQ/+WrGKxhVeliYx7nLQe/zsGpxV4Fn4=";
+      };
+    };
+}
diff --git a/todo.txt b/todo.txt
index 11424bd..bb8b16f 100644
--- a/todo.txt
+++ b/todo.txt
@@ -3,10 +3,10 @@
 * Make depth configurable per directory.
 * Set a default depth in config.yaml.
 * Add excluding/ignoring a repository.
+* Add Nix package.
 
 Add unit tests.
 Add a `--dry-run` option.
 Complete README.
-Add Nix package.
 
 grep -r --exclude-dir=.git TODO .