diff --git a/pkgs/ovito.nix b/pkgs/ovito.nix
index f74335f..7889b4e 100644
--- a/pkgs/ovito.nix
+++ b/pkgs/ovito.nix
@@ -1,8 +1,8 @@
-{ stdenv, fetchFromGitLab, cmake
+{ mkDerivation, lib, fetchFromGitLab, cmake
 , boost, netcdf, hdf5, fftwSinglePrec, muparser, openssl, ffmpeg, python
 , qtbase, qtsvg, qttools, qscintilla }:
 
-stdenv.mkDerivation rec {
+mkDerivation rec {
   pname = "ovito";
   version = "3.4.0";
 
@@ -25,7 +25,7 @@ stdenv.mkDerivation rec {
     qtbase qtsvg qttools qscintilla
   ];
 
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Scientific visualization and analysis software for atomistic and particle simulation data";
     homepage = https://ovito.org;
     license = licenses.gpl3;