anchor.diff:      '';
       extraLibraries = [ pkgs.openblasCompat ];
     });
  -
  -  LambdaHack = super.LambdaHack.override { sdl2-ttf = super.sdl2-ttf_2_0_2; };
   
     # The Haddock phase fails for one reason or another.
     acme-one = dontHaddock super.acme-one;
  
positive.code:   # 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; });
  
negative.code:   # missing dependencies: doctest ==0.12.*
    html-entities = doJailbreak super.html-entities;
  
    # https://github.com/takano-akio/filelock/issues/5
    filelock = dontCheck super.filelock;
  
  