anchor.diff:  
     thumbor = (import ./thumbor { inherit pkgs newrelic-python statsd; }).thumbor;
   
  +  #
  +  # haskell
  +  #
  +
  +  angel = pkgs.haskellPackages.callPackage ./angel {};
  +
  +  myrapi = pkgs.haskellPackages.callPackage ./myrapi { inherit servant servantClient; };
  +  servant = pkgs.haskellPackages.callPackage ./servant {};
  +  servantClient = pkgs.haskellPackages.callPackage ./servant-client { inherit servant servantServer; };
  +  servantServer = pkgs.haskellPackages.callPackage ./servant-server { inherit servant waiAppStatic; };
     waiAppStatic = pkgs.haskellPackages.callPackage ./wai-app-static {};
  -  servant = pkgs.haskellPackages.callPackage ./servant {};
  -  servantServer = pkgs.haskellPackages.callPackage ./servant-server { inherit servant waiAppStatic; };
  -  servantClient = pkgs.haskellPackages.callPackage ./servant-client { inherit servant servantServer; };
  -  myrapi = pkgs.haskellPackages.callPackage ./myrapi { inherit servant servantClient; };
   }
  
positive.code: { pkgs ? import <nixpkgs> { system = "x86_64-linux"; config.allowUnfree = true; }
  , ...
  }:
  
  let
    inherit (pkgs)
  
negative.code: 
    newrelic-php = pkgs.callPackage ./newrelic-php {};
  
    newrelic-sysmond = pkgs.callPackage ./newrelic-sysmond {};
  
    nginx = overrideDerivation (pkgs.nginx.override { ngx_lua = true; }) (args: {
  