anchor.diff:  mapTestOn (rec {
   
     gitAndTools.gitAnnex = linux;
  +
  +  jhc = linux;
   
     haskellPackages_ghc742 = {
       abstractPar = linux;
  
positive.code:     html = linux;
      HTTP = linux;
      HUnit = linux;
      monadPar = linux;
      mtl = linux;
      network = linux;
  
negative.code:     zlib = linux;
    };
  
    haskellPackages_ghc704 = {
      alex = linux;
      cabal2nix = linux;
      cabalInstall = linux;
      cgi = linux;
      fgl = linux;
      funcmp = linux;
      GLUT = linux;
      haddock = linux;
      happy = linux;
      haskellPlatform = linux;
      haskellSrc = linux;
      hopenssl = linux;
      hsdns = linux;
      hsemail = linux;
      hsyslog = linux;
      html = linux;
      HTTP = linux;
      HUnit = linux;
      # This attribute causes an infinite recursion in Hydra!
      # jailbreakCabal = linux;
      mtl = linux;
      network = linux;
      OpenGL = linux;
      parallel = linux;
      parsec = linux;
      primitive = linux;
      QuickCheck = linux;
      regexBase = linux;
      regexCompat = linux;
      regexPosix = linux;
      stm = linux;
      streamproc = linux;
      syb = linux;
      text = linux;
      transformers = linux;
      vector = linux;
      xhtml = linux;
      zlib = linux;
    };
  
    haskellPackages_ghc6123 = {
      alex = linux;
      cabal2nix = linux;
      cabalInstall = linux;
      cgi = linux;
      fgl = linux;
      funcmp = linux;
      GLUT = linux;
      haddock = linux;
      happy = linux;
      haskellPlatform = linux;
      haskellSrc = linux;
      hopenssl = linux;
      hsdns = linux;
      hsemail = linux;
      hsyslog = linux;
      html = linux;
      HTTP = linux;
      HUnit = linux;
      # This attribute causes an infinite recursion in Hydra!
      # jailbreakCabal = linux;
      mtl = linux;
      network = linux;
      OpenGL = linux;
      parallel = linux;
      parsec = linux;
      primitive = linux;
      QuickCheck = linux;
      regexBase = linux;
      regexCompat = linux;
      regexPosix = linux;
      stm = linux;
      streamproc = linux;
      text = linux;
      transformers = linux;
      vector = linux;
      xhtml = linux;
      zlib = linux;
    };
  
    haskellPackages_ghc6104 = {
      alex = linux;
      cabalInstall = linux;
      cgi = linux;
      fgl = linux;
      funcmp = linux;
      GLUT = linux;
      haddock = linux;
      happy = linux;
      haskellPlatform = linux;
      haskellSrc = linux;
      hopenssl = linux;
      hsdns = linux;
      hsyslog = linux;
      html = linux;
      HTTP = linux;
      HUnit = linux;
      # This attribute causes an infinite recursion in Hydra!
      # jailbreakCabal = linux;
      mtl = linux;
      network = linux;
      OpenGL = linux;
      parallel = linux;
      parsec = linux;
      primitive = linux;
      QuickCheck = linux;
      regexBase = linux;
      regexCompat = linux;
      regexPosix = linux;
      stm = linux;
      streamproc = linux;
      text = linux;
      transformers = linux;
      vector = linux;
      xhtml = linux;
      zlib = linux;
    };
  
  })
  