diff --git a/pkgs/applications/office/mytetra/default.nix b/pkgs/applications/office/mytetra/default.nix
index a7887357cd3..afe8ba2f917 100644
--- a/pkgs/applications/office/mytetra/default.nix
+++ b/pkgs/applications/office/mytetra/default.nix
@@ -1,8 +1,8 @@
-{ stdenv, fetchurl, qmake, qtsvg, makeWrapper, xdg_utils }:
+{ stdenv, mkDerivation, fetchurl, qmake, qtsvg, makeWrapper, xdg_utils }:
 
 let
   version = "1.44.55";
-in stdenv.mkDerivation rec {
+in mkDerivation rec {
   name = "mytetra-${version}";
   src = fetchurl {
     url = "https://github.com/xintrea/mytetra_dev/archive/v.${version}.tar.gz";