anchor.diff:        manifestRc = vimUtils.vimrcContent (configure // { customRC = ""; });
         neovimRcContent = vimUtils.vimrcContent configure;
       in
  -    {
  +    args // {
         wrapperArgs = makeWrapperArgs;
         inherit neovimRcContent;
         inherit manifestRc;
  
positive.code: 
      # for forward compability, when adding new environments, haskell etc.
      , ...
      }:
      let
        rubyEnv = bundlerEnv {
          name = "neovim-ruby-env";
  
negative.code:         extraPythonPackages = compatFun extraPythonPackages;
          inherit withPython3;
          extraPython3Packages = compatFun extraPython3Packages;
          inherit withNodeJs withRuby viAlias vimAlias;
          inherit configure;
        };
      in
  