anchor.diff:    # /homeless-shelter. Disabled.
     purescript = dontCheck super.purescript;
   
  -  # Broken by GLUT update.
  -  Monadius = markBroken super.Monadius;
  -
  -  # We don't have the groonga package these libraries bind to.
  -  haroonga = markBroken super.haroonga;
  -  haroonga-httpd = markBroken super.haroonga-httpd;
  -
  -  # Build is broken and no contact info available.
  -  hopenpgp-tools = markBroken super.hopenpgp-tools;
  -
  -  # https://github.com/hunt-framework/hunt/issues/99
  -  hunt-server = markBrokenVersion "0.3.0.2" super.hunt-server;
  -
  -  # https://github.com/bjpop/blip/issues/16
  -  blip = markBroken super.blip;
  -
     # https://github.com/tych0/xcffib/issues/37
     xcffib = dontCheck super.xcffib;
   
     # https://github.com/afcowie/locators/issues/1
     locators = dontCheck super.locators;
  -
  -  # https://github.com/scravy/hydrogen-syntax/issues/1
  -  hydrogen-syntax = markBroken super.hydrogen-syntax;
  -  hydrogen-cli = dontDistribute super.hydrogen-cli;
  -
  -  # https://github.com/meteficha/Hipmunk/issues/8
  -  Hipmunk = markBroken super.Hipmunk;
  -  HipmunkPlayground = dontDistribute super.HipmunkPlayground;
  -  click-clack = dontDistribute super.click-clack;
  -
  -  # https://github.com/fumieval/audiovisual/issues/1
  -  audiovisual = markBroken super.audiovisual;
  -  call = dontDistribute super.call;
  -  rhythm-game-tutorial = dontDistribute super.rhythm-game-tutorial;
   
     # https://github.com/haskell/haddock/issues/378
     haddock-library = dontCheck super.haddock-library;
  
positive.code:   # https://github.com/bos/configurator/issues/22
    configurator = dontCheck super.configurator;
  
    # https://github.com/thoughtpolice/hs-ed25519/issues/9
    ed25519 = markBroken super.ed25519;
    hackage-repo-tool = dontDistribute super.hackage-repo-tool;
    hackage-security = dontDistribute super.hackage-security;
    hackage-security-HTTP = dontDistribute super.hackage-security-HTTP;
  
    # The cabal files for these libraries do not list the required system dependencies.
    SDL-image = overrideCabal super.SDL-image (drv: {
      librarySystemDepends = [ pkgs.SDL pkgs.SDL_image ] ++ drv.librarySystemDepends or [];
  
negative.code:           substituteInPlace double-conversion.cabal --replace stdc++ c++
          '';
        });
  
    # tests don't compile for some odd reason
    jwt = dontCheck super.jwt;
  