anchor.diff:  
     copyIfBundledByPath = { bundledByPath ? false, ...}@main:
     (if bundledByPath then
  -      assert gemFiles.gemdir != null; "cp -a ${gemFiles.gemdir}/* $out/"
  +      assert gemFiles.gemdir != null; "cp -a ${gemFiles.gemdir}/* $out/" #*/
       else ""
     );
   
  
positive.code:           require 'bundler/setup'
          '';
          in stdenv.mkDerivation {
            name = "${pname}-interactive-environment";
            nativeBuildInputs = [ wrappedRuby basicEnv ];
            shellHook = ''
              export OLD_IRBRC=$IRBRC
  
negative.code:     meta = { platforms = ruby.meta.platforms; } // meta;
  
      passthru = rec {
        inherit ruby bundler gems confFiles envPaths;
  
        wrappedRuby = stdenv.mkDerivation {
          name = "wrapped-ruby-${pname'}";
          nativeBuildInputs = [ makeWrapper ];
          buildCommand = ''
            mkdir -p $out/bin
  