anchor.diff:      platforms = platforms.all;
     };
   }
  -
  
positive.code:   preConfigure = "cd dev";
    enableParallelBuilding = true;
  
    passthru.tests = {
      can-run-hello-world = callPackage ./test-can-run-hello-world.nix {};
    };
  
    meta = with stdenv.lib; {
  
negative.code: { stdenv
  , fetchFromGitHub
  , unstableGitUpdater
  , cmake
  , callPackage
  
  