anchor.diff:        scotty
         shakespeare
         snap
  -      snap-loader-dynamic
  +      # Not building, can't figure it out.
  +      # snap-loader-dynamic
         snap-loader-static
         snap-templates
         snaplet-postgresql-simple
  
positive.code:         # See: https://github.com/snapframework/heist/pull/111
          heist = dontCheck super.heist;
  
          # process-extras test suit fails on darwin. See:
          # https://github.com/seereason/process-extras/issues/10
          # process-extras = dontCheck super.process-extras;
  
          # hakyll's test suite requires `util-linux` for some silly
          # reason.
          # hakyll = dontCheck super.hakyll;
  
          # Point at current master, where dependency issues have been
          # fixed.
          snap-loader-dynamic = self.callPackage ~/.dotfiles/nix/pkgs/snap-loader-dynamic { };
        } // (if stdenv.isDarwin then {
          # macOS-specific overrides
  
  
negative.code:     # haskell environment
      myHaskellEnv = haskellPackages.ghcWithHoogle (p: with p; [
        cabal-install
        hlint
        QuickCheck
        hspec
  