diff --git a/pkgs/applications/misc/blender/default.nix b/pkgs/applications/misc/blender/default.nix
index 86b2ab6eb1c..ccbcb239502 100644
--- a/pkgs/applications/misc/blender/default.nix
+++ b/pkgs/applications/misc/blender/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, stdenv_gcc5, lib, fetchurl, boost, cmake, ffmpeg, gettext, glew
+{ stdenv, lib, fetchurl, boost, cmake, ffmpeg, gettext, glew
 , ilmbase, libXi, libX11, libXext, libXrender
 , libjpeg, libpng, libsamplerate, libsndfile
 , libtiff, mesa, openal, opencolorio, openexr, openimageio, openjpeg_1, python
@@ -10,7 +10,7 @@
 
 with lib;
 
-(if cudaSupport then stdenv_gcc5 else stdenv).mkDerivation rec {
+stdenv.mkDerivation rec {
   name = "blender-2.79";
 
   src = fetchurl {
diff --git a/pkgs/development/libraries/opencv/3.x.nix b/pkgs/development/libraries/opencv/3.x.nix
index 8596ab6de88..46ee4ea565b 100644
--- a/pkgs/development/libraries/opencv/3.x.nix
+++ b/pkgs/development/libraries/opencv/3.x.nix
@@ -16,7 +16,7 @@
 , enableGStreamer ? false, gst_all_1
 , enableEigen     ? true, eigen
 , enableOpenblas  ? true, openblas
-, enableCuda      ? false, cudatoolkit, gcc5
+, enableCuda      ? false, cudatoolkit
 , enableTesseract ? false, tesseract, leptonica
 , AVFoundation, Cocoa, QTKit
 }:
@@ -145,7 +145,7 @@ stdenv.mkDerivation rec {
     # simply enabled automatically if contrib is built, and it detects
     # tesseract & leptonica.
     ++ lib.optionals enableTesseract [ tesseract leptonica ]
-    ++ lib.optionals enableCuda [ cudatoolkit gcc5 ]
+    ++ lib.optional enableCuda cudatoolkit
     ++ lib.optional buildContrib protobuf
     ++ lib.optionals stdenv.isDarwin [ AVFoundation Cocoa QTKit ];
 
diff --git a/pkgs/development/libraries/opensubdiv/default.nix b/pkgs/development/libraries/opensubdiv/default.nix
index 442a8444942..64c4f57c724 100644
--- a/pkgs/development/libraries/opensubdiv/default.nix
+++ b/pkgs/development/libraries/opensubdiv/default.nix
@@ -1,9 +1,9 @@
-{ lib, stdenv, stdenv_gcc5, fetchurl, fetchFromGitHub, cmake, pkgconfig, xorg, mesa_glu
+{ lib, stdenv, fetchurl, fetchFromGitHub, cmake, pkgconfig, xorg, mesa_glu
 , mesa_noglu, glew, ocl-icd, python3
 , cudaSupport ? false, cudatoolkit
 }:
 
-(if cudaSupport then stdenv_gcc5 else stdenv).mkDerivation rec {
+stdenv.mkDerivation rec {
   name = "opensubdiv-${version}";
   version = "3.2.0";
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 098fe11b3e2..c9b227ac540 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -10076,7 +10076,6 @@ with pkgs;
   };
 
   opensubdiv = callPackage ../development/libraries/opensubdiv {
-    stdenv_gcc5 = overrideCC stdenv gcc5;
     cudaSupport = config.cudaSupport or false;
     cmake = cmake_2_8;
   };
@@ -13814,7 +13813,6 @@ with pkgs;
   bleachbit = callPackage ../applications/misc/bleachbit { };
 
   blender = callPackage  ../applications/misc/blender {
-    stdenv_gcc5 = overrideCC stdenv gcc5;
     cudaSupport = config.cudaSupport or false;
     python = python35;
   };