anchor.diff:    pforth = callPackage ../development/compilers/pforth {};
   
     picat = callPackage ../development/compilers/picat {
  -    stdenv = overrideCC stdenv gcc49;
  +    stdenv = overrideCC stdenv buildPackages.gcc49;
     };
   
     ponyc = callPackage ../development/compilers/ponyc {
  
positive.code:   exa = callPackage ../tools/misc/exa { };
  
    exempi = callPackage ../development/libraries/exempi {
      stdenv = if stdenv.isi686 then overrideCC stdenv gcc6 else stdenv;
    };
  
    execline = skawarePackages.execline;
  
negative.code:   openfx = callPackage ../development/libraries/openfx {};
  
    openimageio = callPackage ../applications/graphics/openimageio {
      stdenv = overrideCC stdenv buildPackages.gcc6;
    };
  
    openimageio2 = callPackage ../applications/graphics/openimageio/2.x.nix { };
  