anchor.diff:      shakespeareJs shakespeareText text time transformers wai waiExtra
       warp yaml yesod yesodCore yesodDefault yesodForm yesodStatic
     ];
  +  testDepends = [ yesodCore yesodDefault yesodTest ];
     patchPhase = ''
       sed -r -i -e 's|blaze-html * >= 0.5 *&& < 0.6|blaze-html >= 0.5|' hledger-web.cabal
     '';
  
positive.code: , parsec, regexpr, safe, shakespeareCss, shakespeareJs
  , shakespeareText, text, time, transformers, wai, waiExtra, warp
  , yaml, yesod, yesodCore, yesodDefault, yesodForm, yesodStatic
  }:
  
  cabal.mkDerivation (self: {
  
negative.code:     description = "A web interface for the hledger accounting tool";
      license = "GPL";
      platforms = self.ghc.meta.platforms;
    };
  })
  