anchor.diff:      license = "GPLv3+";
   
       maintainers = [ stdenv.lib.maintainers.ludo ];
  +    platforms = stdenv.lib.platforms.linux;
   
       homepage = http://www.gnu.org/software/guix;
     };
  
positive.code:     };
    };
  in stdenv.mkDerivation rec {
    name = "guix-0.2";
  
    src = fetchurl {
      url = "ftp://alpha.gnu.org/gnu/guix/${name}.tar.gz";
      sha256 = "140y0ywbgl6vxl4nwswz4vim2wwdiajxlksj24lnv40aw5hyvifr";
    };
  
    configureFlags =
  
negative.code: 
        In addition to standard package management features, Guix supports
        transactional upgrades and roll-backs, unprivileged package management,
        per-user profiles, and garbage collection.
  
        It provides Guile Scheme APIs, including high-level embedded
        domain-specific languages (EDSLs), to describe how packages are built
  