diff --git a/pkgs/data/fonts/ubuntu-font-family/default.nix b/pkgs/data/fonts/ubuntu-font-family/default.nix
index bab2f3337e1..130aeef88ab 100644
--- a/pkgs/data/fonts/ubuntu-font-family/default.nix
+++ b/pkgs/data/fonts/ubuntu-font-family/default.nix
@@ -1,6 +1,6 @@
 { stdenv, fetchurl, unzip }:
 
-stdenv.mkDerivation {
+stdenv.mkDerivation rec {
   name = "ubuntu-font-family-0.80";
   buildInputs = [unzip];