diff --git a/pkgs/misc/calaos/installer/default.nix b/pkgs/misc/calaos/installer/default.nix
index 81f00d59f69..6254c9c24f4 100644
--- a/pkgs/misc/calaos/installer/default.nix
+++ b/pkgs/misc/calaos/installer/default.nix
@@ -1,6 +1,6 @@
-{ stdenv, fetchFromGitHub, qmake, qttools, qtbase }:
+{ mkDerivation, stdenv, fetchFromGitHub, qmake, qttools, qtbase }:
 
-stdenv.mkDerivation rec {
+mkDerivation rec {
   name = "calaos_installer-3.1";
   version = "3.1";