anchor.diff:    # The tests spuriously fail
     libmpd = dontCheck super.libmpd;
   
  -  # https://github.com/dan-t/cabal-lenses/issues/6
  -  cabal-lenses = doJailbreak super.cabal-lenses;
  -
     # https://github.com/diagrams/diagrams-lib/issues/288
     diagrams-lib = overrideCabal super.diagrams-lib (drv: { doCheck = !pkgs.stdenv.isi686; });
   
  
positive.code:   # });
    libnix = dontCheck super.libnix;
  
    # 2020-06-23: NOTE: > 0.33 => rm 464.patch: https://github.com/jaor/xmobar/issues/466
    # dontCheck: The test suite tries to mess with ALSA, which doesn't work in the build sandbox.
    xmobar = appendPatch (dontCheck super.xmobar) (pkgs.fetchpatch {
      url = "https://github.com/jaor/xmobar/pull/464.patch";
      sha256 = "0y1dd878yzy1cx0cjj0ijd3dmywr7jdmk68vxdjimxzblrdw1al6";
    });
  
    # https://github.com/mgajda/json-autotype/issues/25
    json-autotype = dontCheck super.json-autotype;
  
negative.code:   # https://github.com/kazu-yamamoto/dns/issues/150
    dns = dontCheck super.dns;
  
    # apply patches from https://github.com/snapframework/snap-server/pull/126
    # manually until they are accepted upstream
    snap-server = overrideCabal super.snap-server (drv: {
  