anchor.diff:  
     blender = callPackage  ../applications/misc/blender {
       pythonPackages = python35Packages;
  -    stdenv = overrideCC stdenv buildPackages.gcc6;
  +    stdenv = gcc6Stdenv;
     };
   
     bluefish = callPackage ../applications/editors/bluefish {
  
positive.code:   };
  
    xmr-stak = callPackage ../applications/misc/xmr-stak {
      stdenvGcc6 = overrideCC stdenv buildPackages.gcc6;
    };
  
    xmrig = callPackage ../applications/misc/xmrig { };
  
negative.code:   exa = callPackage ../tools/misc/exa { };
  
    exempi = callPackage ../development/libraries/exempi {
      stdenv = if stdenv.isi686 then gcc6Stdenv else stdenv;
    };
  
    execline = skawarePackages.execline;
  