diff --git a/pkgs/applications/graphics/openscad/default.nix b/pkgs/applications/graphics/openscad/default.nix
index ca3dac34dca..e074721b365 100644
--- a/pkgs/applications/graphics/openscad/default.nix
+++ b/pkgs/applications/graphics/openscad/default.nix
@@ -1,10 +1,10 @@
 { stdenv, fetchFromGitHub, qt5, libsForQt5
 , bison, flex, eigen, boost, libGLU_combined, glew, opencsg, cgal
 , mpfr, gmp, glib, pkgconfig, harfbuzz, gettext, freetype, fontconfig
-, double-conversion, lib3mf, libzip
+, double-conversion, lib3mf, libzip, mkDerivation
 }:
 
-stdenv.mkDerivation rec {
+mkDerivation rec {
   pname = "openscad";
   version = "2019.05";
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index f2b13e2e84d..6903fc15ef1 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -19676,7 +19676,7 @@ in
 
   openorienteering-mapper = libsForQt5.callPackage ../applications/gis/openorienteering-mapper { };
 
-  openscad = callPackage ../applications/graphics/openscad {};
+  openscad = qt5.callPackage ../applications/graphics/openscad {};
 
   opentimestamps-client = python3Packages.callPackage ../tools/misc/opentimestamps-client {};