anchor.diff:  
     compactStringFix = callPackage ../development/libraries/haskell/compact-string-fix {};
   
  -  compdata = if (pkgs.stdenv.lib.versionOlder "7.8" ghc.version)
  -               then callPackage ../development/libraries/haskell/compdata {}
  -               else null;
  +  compdata = callPackage ../development/libraries/haskell/compdata {};
   
     compdataParam = callPackage ../development/libraries/haskell/compdata-param {};
   
  
positive.code: 
    hsdns = callPackage ../development/libraries/haskell/hsdns {};
  
    hsemail = if (pkgs.stdenv.lib.versionOlder ghc.version "7") then null else
      callPackage ../development/libraries/haskell/hsemail {};
  
    hslua = callPackage ../development/libraries/haskell/hslua {
      lua = pkgs.lua5_1;
  
negative.code: 
    textStreamDecode = callPackage ../development/libraries/haskell/text-stream-decode {};
  
    tfRandom = callPackage ../development/libraries/haskell/tf-random {};
  
    these = callPackage ../development/libraries/haskell/these {};
  
  