anchor.diff:    xhtml = null;
   
     # Ignore overly restrictive upper version bounds.
  +  aeson-diff = doJailbreak super.aeson-diff;
     async = doJailbreak super.async;
     cabal-install = doJailbreak super.cabal-install;
     ChasingBottoms = doJailbreak super.ChasingBottoms;
  
positive.code:     sha256 = "0zsgzn0nvdxvqi5z0za3gzlhql2x5d5cr0kkr19j5c67fy177w6b";
    });
  
    # over-specified version constraints
    aeson-diff = doJailbreak super.aeson-diff;
  
    # https://github.com/sol/hpack/issues/371
    hpack = appendPatch super.hpack (pkgs.fetchpatch {
      url = "https://gitlab.haskell.org/ghc/head.hackage/raw/master/patches/hpack-0.32.0.patch";
  
negative.code:   string-qq = self.string-qq_0_0_4;
    tls = self.tls_1_5_1;
    xmonad-contrib = self.xmonad-contrib_0_16;
    shelly = self.shelly_1_9_0;
  
  }
  