anchor.diff:      version = "6.0.37";
       url = "http://developer.download.nvidia.com/compute/cuda/6_0/rel/installers/cuda_6.0.37_linux_64.run";
       sha256 = "991e436c7a6c94ec67cf44204d136adfef87baa3ded270544fa211179779bc40";
  +    gcc = gcc48;
     };
   
     cudatoolkit65 = common {
       version = "6.5.19";
       url = "http://developer.download.nvidia.com/compute/cuda/6_5/rel/installers/cuda_6.5.19_linux_64.run";
       sha256 = "1x9zdmk8z784d3d35vr2ak1l4h5v4jfjhpxfi9fl9dvjkcavqyaj";
  +    gcc = gcc48;
     };
   
     cudatoolkit7 = common {
       version = "7.0.28";
       url = "http://developer.download.nvidia.com/compute/cuda/7_0/Prod/local_installers/cuda_7.0.28_linux.run";
       sha256 = "1km5hpiimx11jcazg0h3mjzk220klwahs2vfqhjavpds5ff2wafi";
  +    gcc = gcc49;
     };
   
     cudatoolkit75 = common {
       version = "7.5.18";
       url = "http://developer.download.nvidia.com/compute/cuda/7.5/Prod/local_installers/cuda_7.5.18_linux.run";
       sha256 = "1v2ylzp34ijyhcxyh5p6i0cwawwbbdhni2l5l4qm21s1cx9ish88";
  +    gcc = gcc49;
     };
   
     cudatoolkit8 = common {
       version = "8.0.61";
       url = "https://developer.nvidia.com/compute/cuda/8.0/Prod2/local_installers/cuda_8.0.61_375.26_linux-run";
       sha256 = "1i4xrsqbad283qffvysn88w2pmxzxbbby41lw0j1113z771akv4w";
  +    gcc = gcc5;
     };
   
     cudatoolkit9 = common {
       version = "9.0.176";
       url = "https://developer.nvidia.com/compute/cuda/9.0/Prod/local_installers/cuda_9.0.176_384.81_linux-run";
       sha256 = "0308rmmychxfa4inb1ird9bpgfppgr9yrfg1qp0val5azqik91ln";
  +    gcc = gcc6;
     };
   
   }
  
positive.code:         # Remove OpenCL libraries as they are provided by ocl-icd and driver.
          rm -f $out/lib64/libOpenCL*
  
        '' + lib.optionalString (lib.versionOlder version "8.0") ''
          # Hack to fix building against recent Glibc/GCC.
          echo "NIX_CFLAGS_COMPILE+=' -D_FORCE_INLINES'" >> $out/nix-support/setup-hook
        '';
  
        meta = with stdenv.lib; {
          description = "A compiler for NVIDIA GPUs, math libraries, and tools";
  
negative.code: { lib, stdenv, makeWrapper, fetchurl, requireFile, patchelf, perl, ncurses, expat, python27, zlib
  , gcc48, gcc49, gcc5, gcc6
  , xorg, gtk2, glib, fontconfig, freetype, unixODBC, alsaLib, glibc
  }:
  
  let
  
    common =
      args@{ gcc, version, sha256
      , url ? ""
      , name ? ""
      , developerProgram ? false
  