anchor.diff:       then self.buildHaskellPackages.tasty-discover
        else dontCheck super.tasty-discover);
   
  -  # generic-deriving bound is too tight
  -  # aeson 1.4.6.0 needs Diff 0.4.0 to do tests but nixpkgs is still at 0.3.4
  -  # https://github.com/bos/aeson/issues/740
  -  aeson = dontCheck (doJailbreak super.aeson);
  -
  -  # containers >=0.4 && <0.6 is too tight
  -  # https://github.com/RaphaelJ/friday/issues/34
  +  # Waiting on https://github.com/RaphaelJ/friday/pull/36
     friday = doJailbreak super.friday;
   
     # Won't compile with recent versions of QuickCheck.
  
positive.code: 
    # https://github.com/alphaHeavy/lzma-enumerator/issues/3
    lzma-enumerator = dontCheck super.lzma-enumerator;
  
    # https://github.com/haskell-hvr/lzma/issues/14
    lzma = dontCheck super.lzma;
  
    # https://github.com/BNFC/bnfc/issues/140
    BNFC = dontCheck super.BNFC;
  
    # FPCO's fork of Cabal won't succeed its test suite.
    Cabal-ide-backend = dontCheck super.Cabal-ide-backend;
  
negative.code:   # https://github.com/junjihashimoto/test-sandbox-compose/issues/2
    test-sandbox-compose = dontCheck super.test-sandbox-compose;
  
    # Waiting on language-python 0.5.8 https://github.com/bjpop/language-python/issues/60
    xcffib = dontCheck super.xcffib;
  
    # https://github.com/afcowie/locators/issues/1
  