diff --git a/pkgs/misc/screensavers/slock/default.nix b/pkgs/misc/screensavers/slock/default.nix
index 782557625338..4216e10460d6 100644
--- a/pkgs/misc/screensavers/slock/default.nix
+++ b/pkgs/misc/screensavers/slock/default.nix
@@ -2,7 +2,10 @@
 , xorgproto, libX11, libXext, libXrandr, libxcrypt
 # default header can be obtained from
 # https://git.suckless.org/slock/tree/config.def.h
-, conf ? null }:
+, conf ? null
+# update script dependencies
+, gitUpdater
+}:
 
 stdenv.mkDerivation (finalAttrs: {
   pname = "slock";
@@ -25,6 +28,10 @@ stdenv.mkDerivation (finalAttrs: {
 
   makeFlags = [ "CC:=$(CC)" ];
 
+  passthru.updateScript = gitUpdater {
+    url = "git://git.suckless.org/slock";
+  };
+
   meta = with lib; {
     homepage = "https://tools.suckless.org/slock";
     description = "Simple X display locker";