anchor.diff:    # Depends on broken fluid.
     fluid-idl-http-client = markBroken super.fluid-idl-http-client;
     fluid-idl-scotty = markBroken super.fluid-idl-scotty;
  -
  -  # depends on amqp >= 0.17
  -  amqp-utils = super.amqp-utils.override { amqp = dontCheck super.amqp_0_18_1; };
   
     # Build with gi overloading feature disabled.
     ltk = super.ltk.overrideScope (self: super: { haskell-gi-overloading = self.haskell-gi-overloading_0_0; });
  
positive.code:   # missing dependencies: doctest ==0.12.*
    html-entities = doJailbreak super.html-entities;
  
    # Needs a version that's newer than what we have in lts-9.
    sbv = super.sbv.override { doctest = self.doctest_0_13_0; };
  
    # https://github.com/takano-akio/filelock/issues/5
    filelock = dontCheck super.filelock;
  
  
negative.code:     '';
      extraLibraries = [ pkgs.openblasCompat ];
    });
  
    # The Haddock phase fails for one reason or another.
    acme-one = dontHaddock super.acme-one;
  