diff --git a/pkgs/development/libraries/physics/geant4/default.nix b/pkgs/development/libraries/physics/geant4/default.nix
index 2130e3feffa..57d6a87b594 100644
--- a/pkgs/development/libraries/physics/geant4/default.nix
+++ b/pkgs/development/libraries/physics/geant4/default.nix
@@ -1,55 +1,40 @@
-{ enableMultiThreading ? false
+{ enableMultiThreading ? true
 , enableG3toG4         ? false
 , enableInventor       ? false
 , enableGDML           ? false
 , enableQT             ? false
 , enableXM             ? false
-, enableOpenGLX11      ? false
+, enableOpenGLX11      ? true
 , enableRaytracerX11   ? false
 
 # Standard build environment with cmake.
 , stdenv, fetchurl, cmake
 
 # Optional system packages, otherwise internal GEANT4 packages are used.
-, clhep ? null
-, expat ? null
-, zlib  ? null
+, clhep ? null # not packaged currently
+, expat
+, zlib
 
 # For enableGDML.
-, xercesc ? null
+, xercesc
 
 # For enableQT.
-, qt ? null # qt4SDK or qt5SDK
+, qtbase
 
 # For enableXM.
-, motif ? null # motif or lesstif
+, motif
 
 # For enableInventor
 , coin3d
 , soxt
-, libXpm ? null
+, libXpm
 
 # For enableQT, enableXM, enableOpenGLX11, enableRaytracerX11.
-, libGLU_combined ? null
-, xlibsWrapper ? null
-, libXmu ? null
+, libGLU_combined
+, xlibsWrapper
+, libXmu
 }:
 
-# G4persistency library with support for GDML
-assert enableGDML -> xercesc != null;
-
-# If enableQT, Qt4/5 User Interface and Visualization drivers.
-assert enableQT -> qt != null;
-
-# Motif User Interface and Visualisation drivers.
-assert enableXM -> motif != null;
-
-# OpenGL/X11 User Interface and Visualisation drivers.
-assert enableQT || enableXM || enableOpenGLX11 || enableRaytracerX11 -> libGLU_combined   != null;
-assert enableQT || enableXM || enableOpenGLX11 || enableRaytracerX11 -> xlibsWrapper    != null;
-assert enableQT || enableXM || enableOpenGLX11 || enableRaytracerX11 -> libXmu != null;
-assert enableInventor -> libXpm != null;
-
 stdenv.mkDerivation rec {
   version = "10.4.1";
   name = "geant4-${version}";
@@ -82,7 +67,7 @@ stdenv.mkDerivation rec {
   buildInputs = [ clhep expat zlib libGLU_combined xlibsWrapper libXmu ]
     ++ stdenv.lib.optionals enableGDML [ xercesc ]
     ++ stdenv.lib.optionals enableXM [ motif ]
-    ++ stdenv.lib.optionals enableQT [ qt ]
+    ++ stdenv.lib.optionals enableQT [ qtbase ]
     ++ stdenv.lib.optionals enableInventor [ libXpm coin3d soxt ];
 
   postFixup = ''
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 2452b73f961..e8152077633 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -21286,26 +21286,7 @@ with pkgs;
 
   fastnlo = callPackage ../development/libraries/physics/fastnlo { };
 
-  geant4 = callPackage ../development/libraries/physics/geant4 {
-    enableMultiThreading = true;
-    enableG3toG4         = false;
-    enableInventor       = false;
-    enableGDML           = false;
-    enableQT             = false;
-    enableXM             = false;
-    enableOpenGLX11      = true;
-    enableRaytracerX11   = false;
-
-    # Optional system packages, otherwise internal GEANT4 packages are used.
-    clhep = null;
-    zlib  = null;
-
-    # For enableGDML.
-    xercesc = null;
-
-    # For enableQT.
-    qt = null; # qt4SDK or qt5SDK
-  };
+  geant4 = libsForQt5.callPackage ../development/libraries/physics/geant4 { };
 
   cernlib = callPackage ../development/libraries/physics/cernlib { };