diff --git a/pkgs/applications/version-management/git-and-tools/default.nix b/pkgs/applications/version-management/git-and-tools/default.nix
index 4cabe3a4e2a..b90829c3330 100644
--- a/pkgs/applications/version-management/git-and-tools/default.nix
+++ b/pkgs/applications/version-management/git-and-tools/default.nix
@@ -73,7 +73,7 @@ rec {
   };
 
   hub = import ./hub {
-    inherit (rubyLibs) rake;
+    inherit (rubyPackages) rake;
     inherit stdenv fetchurl groff makeWrapper;
   };
 
diff --git a/pkgs/applications/version-management/redmine/bootstrap.nix b/pkgs/applications/version-management/redmine/bootstrap.nix
index 4b4359603c9..7bb9e268497 100644
--- a/pkgs/applications/version-management/redmine/bootstrap.nix
+++ b/pkgs/applications/version-management/redmine/bootstrap.nix
@@ -14,7 +14,7 @@ in stdenv.mkDerivation rec {
     sha256 = "0x0zwxyj4dwbk7l64s3lgny10mjf0ba8jwrbafsm4d72sncmacv0";
   };
   buildInputs = [
-    ruby rubyLibs.bundler libiconv libxslt libxml2 pkgconfig
+    ruby rubyPackages.bundler libiconv libxslt libxml2 pkgconfig
     libffi imagemagickBig postgresql which stdenv
   ];
   installPhase = ''
diff --git a/pkgs/applications/version-management/redmine/default.nix b/pkgs/applications/version-management/redmine/default.nix
index 4655a16671e..22fe6ba5be0 100644
--- a/pkgs/applications/version-management/redmine/default.nix
+++ b/pkgs/applications/version-management/redmine/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ruby, rubyLibs, libiconv, libxslt, libxml2, pkgconfig, libffi, imagemagickBig, postgresql }:
+{ stdenv, fetchurl, ruby, rubyPackages, libiconv, libxslt, libxml2, pkgconfig, libffi, imagemagickBig, postgresql }:
 
 let
   gemspec = map (gem: fetchurl { url=gem.url; sha256=gem.hash; }) (import ./Gemfile.nix);
@@ -25,7 +25,7 @@ in stdenv.mkDerivation rec {
   '';
 
   buildInputs = [
-    ruby rubyLibs.bundler libiconv libxslt libxml2 pkgconfig libffi
+    ruby rubyPackages.bundler libiconv libxslt libxml2 pkgconfig libffi
     imagemagickBig postgresql
   ];
 
diff --git a/pkgs/development/interpreters/ruby/packages.nix b/pkgs/development/interpreters/ruby/packages.nix
new file mode 100644
index 00000000000..a35ccae6419
--- /dev/null
+++ b/pkgs/development/interpreters/ruby/packages.nix
@@ -0,0 +1,11 @@
+{ ruby, rubygemsFun, callPackage }:
+
+{
+  # Nix utilities
+  gemFixes = callPackage ../development/interpreters/ruby/fixes.nix { };
+  buildRubyGem = callPackage ../development/interpreters/ruby/gem.nix { inherit ruby; };
+  loadRubyEnv = callPackage ../development/interpreters/ruby/load-ruby-env.nix { inherit ruby; };
+
+  # Gems
+  rubygems = rubygemsFun ruby;
+}
diff --git a/pkgs/development/libraries/xapian/bindings/1.0.x.nix b/pkgs/development/libraries/xapian/bindings/1.0.x.nix
index 9ce5312f69a..2d44542e8fd 100644
--- a/pkgs/development/libraries/xapian/bindings/1.0.x.nix
+++ b/pkgs/development/libraries/xapian/bindings/1.0.x.nix
@@ -42,7 +42,7 @@ composableDerivation.composableDerivation {} rec {
            name = "ruby";
            enable = {
              buildInputs = [ ruby ];
-             # export same env vars as in rubyLibs 
+             # export same env vars as in rubyPackages 
              preConfigure = ''
                export RUBY_LIB=$out/${ruby.libPath}
                export RUBY_LIB_ARCH=$RUBY_LIB
diff --git a/pkgs/development/libraries/xapian/bindings/default.nix b/pkgs/development/libraries/xapian/bindings/default.nix
index 789d9a65308..8c1a4069748 100644
--- a/pkgs/development/libraries/xapian/bindings/default.nix
+++ b/pkgs/development/libraries/xapian/bindings/default.nix
@@ -42,7 +42,7 @@ composableDerivation.composableDerivation {} rec {
            name = "ruby";
            enable = {
              buildInputs = [ ruby ];
-             # export same env vars as in rubyLibs 
+             # export same env vars as in rubyPackages 
              preConfigure = ''
                export RUBY_LIB=$out/${ruby.libPath}
                export RUBY_LIB_ARCH=$RUBY_LIB
diff --git a/pkgs/development/tools/vagrant/default.nix b/pkgs/development/tools/vagrant/default.nix
index bd9ccf4947b..602d95076a4 100644
--- a/pkgs/development/tools/vagrant/default.nix
+++ b/pkgs/development/tools/vagrant/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, dpkg, curl, libarchive, openssl, ruby, rubyLibs, libiconv
+{ stdenv, fetchurl, dpkg, curl, libarchive, openssl, ruby, rubyPackages, libiconv
 , libxml2, libxslt }:
 
 assert stdenv.system == "x86_64-linux" || stdenv.system == "i686-linux";
@@ -58,7 +58,7 @@ stdenv.mkDerivation rec {
     ln -s ${ruby}/bin/erb opt/vagrant/embedded/bin
     ln -s ${ruby}/bin/gem opt/vagrant/embedded/bin
     ln -s ${ruby}/bin/irb opt/vagrant/embedded/bin
-    ln -s ${rubyLibs.rake}/bin/rake opt/vagrant/embedded/bin
+    ln -s ${rubyPackages.rake}/bin/rake opt/vagrant/embedded/bin
     ln -s ${ruby}/bin/rdoc opt/vagrant/embedded/bin
     ln -s ${ruby}/bin/ri opt/vagrant/embedded/bin
     ln -s ${ruby}/bin/ruby opt/vagrant/embedded/bin
diff --git a/pkgs/misc/misc.nix b/pkgs/misc/misc.nix
index 87be974ca96..6357c4e6f90 100644
--- a/pkgs/misc/misc.nix
+++ b/pkgs/misc/misc.nix
@@ -16,7 +16,7 @@ in
       packageOverrides = {
 	rubyCollection = collection {
 	  name = "ruby";
-	  list = let l = rubyLibs; in
+	  list = let l = rubyPackages; in
 	    [ pkgs.ruby l.chronic l.sup ];
 	};
       }
diff --git a/pkgs/servers/consul/default.nix b/pkgs/servers/consul/default.nix
index 9244ee2f2cf..fdde367f7eb 100644
--- a/pkgs/servers/consul/default.nix
+++ b/pkgs/servers/consul/default.nix
@@ -1,5 +1,5 @@
 { stdenv, lib, go, fetchgit, fetchhg, fetchbzr, fetchFromGitHub
-, ruby, rubyLibs, nodejs }:
+, ruby, rubyPackages, nodejs }:
 
 let
   version = "0.4.0";
@@ -13,10 +13,10 @@ stdenv.mkDerivation {
     inherit stdenv lib fetchgit fetchhg fetchbzr fetchFromGitHub;
   };
 
-  buildInputs = [ go ruby rubyLibs.sass nodejs ];
+  buildInputs = [ go ruby rubyPackages.sass nodejs ];
 
   configurePhase = flip concatMapStrings
-    (with rubyLibs; [ execjs json minitest rake rdoc sass uglifier ])
+    (with rubyPackages; [ execjs json minitest rake rdoc sass uglifier ])
     (gem: ''
       export GEM_PATH="$GEM_PATH:${gem}/${ruby.gemPath}"
     '');
diff --git a/pkgs/tools/audio/mpdcron/default.nix b/pkgs/tools/audio/mpdcron/default.nix
index 6a59fc49a95..785565fc38d 100644
--- a/pkgs/tools/audio/mpdcron/default.nix
+++ b/pkgs/tools/audio/mpdcron/default.nix
@@ -1,5 +1,5 @@
 { stdenv, fetchgit, autoconf, automake, libtool, pkgconfig, glib, libdaemon
-, mpd_clientlib, curl, sqlite, ruby, rubyLibs, libnotify, haskellPackages }:
+, mpd_clientlib, curl, sqlite, ruby, rubyPackages, libnotify, haskellPackages }:
 
 stdenv.mkDerivation rec {
   version = "20130809";
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   buildInputs =
     [ autoconf automake libtool pkgconfig glib libdaemon haskellPackages.pandoc
-      mpd_clientlib curl sqlite ruby rubyLibs.nokogiri libnotify ];
+      mpd_clientlib curl sqlite ruby rubyPackages.nokogiri libnotify ];
 
   preConfigure = ''
     ./autogen.sh
diff --git a/pkgs/tools/package-management/gem-nix/default.nix b/pkgs/tools/package-management/gem-nix/default.nix
index e048122b287..37130b69591 100644
--- a/pkgs/tools/package-management/gem-nix/default.nix
+++ b/pkgs/tools/package-management/gem-nix/default.nix
@@ -1,9 +1,9 @@
-{ stdenv, rubygems, rubyLibs, ruby, makeWrapper }:
+{ stdenv, rubygems, rubyPackages, ruby, makeWrapper }:
 
 stdenv.mkDerivation rec {
   name = "gem-nix";
 
-  buildInputs = [ ruby rubygems rubyLibs.nix makeWrapper ];
+  buildInputs = [ ruby rubygems rubyPackages.nix makeWrapper ];
 
   phases = ["installPhase"];
 
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 52ef2292dcb..d43effa6907 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -654,7 +654,7 @@ let
   ccnet = callPackage ../tools/networking/ccnet { };
 
   consul = callPackage ../servers/consul {
-    inherit ruby rubyLibs;
+    inherit ruby rubyPackages;
   };
 
   consul_ui = consul.ui;
@@ -4050,6 +4050,8 @@ let
   ruby_2_0 = ruby_2_0_0;
   ruby_2_1 = ruby_2_1_3;
 
+  rubyPackages = callPackage ../development/interpreters/ruby/packages.nix { };
+
   rubygemsFun = ruby: builderDefsPackage (import ../development/interpreters/ruby/rubygems.nix) {
     inherit ruby makeWrapper;
   };
@@ -9968,7 +9970,7 @@ let
 
   ruby_gpgme = callPackage ../development/libraries/ruby_gpgme {
     ruby = ruby_1_9_3;
-    hoe = rubyLibs.hoe;
+    hoe = rubyPackages.hoe;
   };
 
   ruby_ncursesw_sup = callPackage ../development/libraries/ruby_ncursesw_sup { };
@@ -9979,7 +9981,7 @@ let
 
   smtube = callPackage ../applications/video/smtube {};
 
-  sup = with rubyLibs; callPackage ../applications/networking/mailreaders/sup {
+  sup = with rubyPackages; callPackage ../applications/networking/mailreaders/sup {
     ruby = ruby_1_9_3.override {
       cursesSupport = true;
     };
@@ -9992,7 +9994,7 @@ let
 
     # See https://github.com/NixOS/nixpkgs/issues/1804 and
     # https://github.com/NixOS/nixpkgs/issues/2146
-    bundler = pkgs.lib.overrideDerivation pkgs.rubyLibs.bundler (
+    bundler = pkgs.lib.overrideDerivation pkgs.rubyPackages.bundler (
       oldAttrs: {
         dontPatchShebangs = 1;
       }
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 000ff72bd48..7238ccdf917 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -11495,7 +11495,7 @@ let
     propagatedBuildInputs = with self; [ dateutil ];
 
     preInstall = stdenv.lib.optionalString stdenv.isDarwin ''
-      sed -i 's|^\([ ]*\)self.bin_path.*$|\1self.bin_path = "${pkgs.rubyLibs.terminal_notifier}/bin/terminal-notifier"|' build/lib/pync/TerminalNotifier.py
+      sed -i 's|^\([ ]*\)self.bin_path.*$|\1self.bin_path = "${pkgs.rubyPackages.terminal_notifier}/bin/terminal-notifier"|' build/lib/pync/TerminalNotifier.py
     '';
 
     meta = with stdenv.lib; {