diff --git a/nixos/modules/services/misc/redmine.nix b/nixos/modules/services/misc/redmine.nix
index 5d91468753b4..059cc18733bb 100644
--- a/nixos/modules/services/misc/redmine.nix
+++ b/nixos/modules/services/misc/redmine.nix
@@ -8,7 +8,6 @@ let
   cfg = config.services.redmine;
 
   ruby = pkgs.ruby;
-  rubyPackages = pkgs.rubyPackages;
 
   databaseYml = ''
     production:
diff --git a/pkgs/applications/networking/mailreaders/sup/.bundix/cache b/pkgs/applications/networking/mailreaders/sup/.bundix/cache
new file mode 100644
index 000000000000..5894e96022c8
--- /dev/null
+++ b/pkgs/applications/networking/mailreaders/sup/.bundix/cache
@@ -0,0 +1,4 @@
+---
+gem:
+  https://rubygems.org/downloads/mini_portile-0.6.0.gem: 09kcn4g63xrdirgwxgjikqg976rr723bkc9bxfr29pk22cj3wavn
+  https://rubygems.org/downloads/gpgme-2.0.7.gem: 1p84zhiri2ihcld7py9mwc2kg5xs5da8fk11zhndrhmw05yvf5mr
diff --git a/pkgs/applications/networking/mailreaders/sup/.bundle/config b/pkgs/applications/networking/mailreaders/sup/.bundle/config
new file mode 100644
index 000000000000..88cb2d529351
--- /dev/null
+++ b/pkgs/applications/networking/mailreaders/sup/.bundle/config
@@ -0,0 +1,2 @@
+---
+BUNDLE_NO_INSTALL: true
diff --git a/pkgs/applications/networking/mailreaders/sup/Gemfile b/pkgs/applications/networking/mailreaders/sup/Gemfile
new file mode 100644
index 000000000000..f7d13a163268
--- /dev/null
+++ b/pkgs/applications/networking/mailreaders/sup/Gemfile
@@ -0,0 +1,6 @@
+source "https://rubygems.org"
+
+#gem "sup", "0.20.0"
+#gem 'sup', '~> 0.20.0'
+#gem 'gpgme'
+gem 'gpgme', '2.0.7'
diff --git a/pkgs/applications/networking/mailreaders/sup/Gemfile.lock b/pkgs/applications/networking/mailreaders/sup/Gemfile.lock
new file mode 100644
index 000000000000..2f56752d9a2f
--- /dev/null
+++ b/pkgs/applications/networking/mailreaders/sup/Gemfile.lock
@@ -0,0 +1,12 @@
+GEM
+  remote: https://rubygems.org/
+  specs:
+    gpgme (2.0.7)
+      mini_portile (>= 0.5.0, <= 0.6.0)
+    mini_portile (0.6.0)
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  gpgme (= 2.0.7)
diff --git a/pkgs/applications/networking/mailreaders/sup/gemset.nix b/pkgs/applications/networking/mailreaders/sup/gemset.nix
new file mode 100644
index 000000000000..de28a5dfeb39
--- /dev/null
+++ b/pkgs/applications/networking/mailreaders/sup/gemset.nix
@@ -0,0 +1,19 @@
+{
+  gpgme = {
+    version = "2.0.7";
+    src = {
+      type = "gem";
+      sha256 = "1p84zhiri2ihcld7py9mwc2kg5xs5da8fk11zhndrhmw05yvf5mr";
+    };
+    dependencies = [
+      "mini_portile"
+    ];
+  };
+  mini_portile = {
+    version = "0.6.0";
+    src = {
+      type = "gem";
+      sha256 = "09kcn4g63xrdirgwxgjikqg976rr723bkc9bxfr29pk22cj3wavn";
+    };
+  };
+}
\ No newline at end of file
diff --git a/pkgs/applications/version-management/redmine/default.nix b/pkgs/applications/version-management/redmine/default.nix
index ea3a07db724a..544c4218e00f 100644
--- a/pkgs/applications/version-management/redmine/default.nix
+++ b/pkgs/applications/version-management/redmine/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchurl, ruby, rubyPackages, libiconv, libiconvOrNull, libiconvOrLibc, libxslt, libxml2, pkgconfig, libffi, glibc, imagemagickBig, postgresql }:
+{ stdenv, fetchurl, ruby, rubyPackages, bundler, libiconv, libiconvOrNull, libiconvOrLibc, libxslt, libxml2, pkgconfig, libffi, glibc, 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 rubyPackages.bundler 
+    ruby bundler
   ] ++ (if (libiconvOrNull != null) then [libiconv] else []) ++ [
     libxslt libxml2 pkgconfig libffi
     imagemagickBig postgresql
diff --git a/pkgs/development/interpreters/ruby/bundler-head.nix b/pkgs/development/interpreters/ruby/bundler-head.nix
new file mode 100644
index 000000000000..62169759bf5d
--- /dev/null
+++ b/pkgs/development/interpreters/ruby/bundler-head.nix
@@ -0,0 +1,18 @@
+{ buildRubyGem, coreutils, fetchgit }:
+
+buildRubyGem {
+  name = "bundler-HEAD";
+  src = fetchgit {
+    url = "https://github.com/bundler/bundler.git";
+    rev = "17919e790cd8f6fb369d6afc81f0afec6fb5ad8b";
+    sha256 = "10gqashaax0i18gs95pijqsnpnwfj9v3va5rpxps0v597d16px9b";
+    leaveDotGit = true;
+  };
+  dontPatchShebangs = true;
+  postInstall = ''
+    find $out -type f -perm +0100 | while read f; do
+      substituteInPlace $f \
+         --replace "/usr/bin/env" "${coreutils}/bin/env"
+    done
+  '';
+}
diff --git a/pkgs/development/interpreters/ruby/bundler.nix b/pkgs/development/interpreters/ruby/bundler.nix
index a66aa08c1f5d..cbec8d0ad75b 100644
--- a/pkgs/development/interpreters/ruby/bundler.nix
+++ b/pkgs/development/interpreters/ruby/bundler.nix
@@ -1,7 +1,13 @@
-{ buildRubyGem }:
+{ buildRubyGem, coreutils }:
 
 buildRubyGem {
-  name = "bundler-1.7.4";
-  sha256 = "122k07z60780mr00zfbbw04v9xlw1fhxjsx4g2rbm66hxlnlnh89";
+  name = "bundler-1.7.9";
+  sha256 = "1gd201rh17xykab9pbqp0dkxfm7b9jri02llyvmrc0c5bz2vhycm";
   dontPatchShebangs = true;
+  postInstall = ''
+    find $out -type f -perm +0100 | while read f; do
+      substituteInPlace $f \
+         --replace "/usr/bin/env" "${coreutils}/bin/env"
+    done
+  '';
 }
diff --git a/pkgs/development/libraries/xapian/bindings/1.0.x.nix b/pkgs/development/libraries/xapian/bindings/1.0.x.nix
index 2d44542e8fd8..5d69f73d7973 100644
--- a/pkgs/development/libraries/xapian/bindings/1.0.x.nix
+++ b/pkgs/development/libraries/xapian/bindings/1.0.x.nix
@@ -42,7 +42,6 @@ composableDerivation.composableDerivation {} rec {
            name = "ruby";
            enable = {
              buildInputs = [ ruby ];
-             # export same env vars as in rubyPackages 
              preConfigure = ''
                export RUBY_LIB=$out/${ruby.libPath}
                export RUBY_LIB_ARCH=$RUBY_LIB
diff --git a/pkgs/development/libraries/xapian/bindings/default.nix b/pkgs/development/libraries/xapian/bindings/default.nix
index 8c1a4069748a..740b71c59a7d 100644
--- a/pkgs/development/libraries/xapian/bindings/default.nix
+++ b/pkgs/development/libraries/xapian/bindings/default.nix
@@ -42,7 +42,6 @@ composableDerivation.composableDerivation {} rec {
            name = "ruby";
            enable = {
              buildInputs = [ ruby ];
-             # export same env vars as in rubyPackages 
              preConfigure = ''
                export RUBY_LIB=$out/${ruby.libPath}
                export RUBY_LIB_ARCH=$RUBY_LIB
diff --git a/pkgs/servers/consul/default.nix b/pkgs/servers/consul/default.nix
index 94eff57e7c33..f056a8d496e6 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, rubyPackages, nodejs, loadRubyEnv }:
+, ruby, nodejs, loadRubyEnv }:
 
 let
   version = "0.4.1";
diff --git a/pkgs/tools/audio/mpdcron/default.nix b/pkgs/tools/audio/mpdcron/default.nix
index f9f33d84437d..a6fe1151b77d 100644
--- a/pkgs/tools/audio/mpdcron/default.nix
+++ b/pkgs/tools/audio/mpdcron/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchgit, autoconf, automake, libtool, pkgconfig, glib, libdaemon
+{ stdenv, fetchgit, autoconf, automake, libtool, pkgconfig, glib, libdaemon, buildRubyGem
 , mpd_clientlib, curl, sqlite, ruby, rubyPackages, libnotify, haskellPackages }:
 
 stdenv.mkDerivation rec {
@@ -21,7 +21,7 @@ stdenv.mkDerivation rec {
 
   buildInputs =
     [ autoconf automake libtool pkgconfig glib libdaemon haskellPackages.pandoc
-      mpd_clientlib curl sqlite ruby rubyPackages.nokogiri libnotify ];
+      mpd_clientlib curl sqlite ruby /*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
deleted file mode 100644
index 37130b695918..000000000000
--- a/pkgs/tools/package-management/gem-nix/default.nix
+++ /dev/null
@@ -1,23 +0,0 @@
-{ stdenv, rubygems, rubyPackages, ruby, makeWrapper }:
-
-stdenv.mkDerivation rec {
-  name = "gem-nix";
-
-  buildInputs = [ ruby rubygems rubyPackages.nix makeWrapper ];
-
-  phases = ["installPhase"];
-
-  installPhase = ''
-    mkdir -p $out/bin
-    echo 'exec ${rubygems}/bin/gem nix "$@"' >> $out/bin/gem-nix
-    chmod +x $out/bin/gem-nix
-    wrapProgram $out/bin/gem-nix \
-      --set GEM_PATH $GEM_PATH
-  '';
-
-  meta = with stdenv.lib; {
-    description = "gem nix command in a nice wrapper";
-    platforms = platforms.unix;
-    maintainers = [ maintainers.iElectric ];
-  };
-}
diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index 69e22d161f6b..9c966b0066ff 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -4189,6 +4189,7 @@ let
   };
 
   bundler = callPackage ../development/interpreters/ruby/bundler.nix { };
+  bundler_HEAD = callPackage ../development/interpreters/ruby/bundler-head.nix { };
   gemFixes = callPackage ../development/interpreters/ruby/fixes.nix { };
   buildRubyGem = callPackage ../development/interpreters/ruby/gem.nix { };
   loadRubyEnv = callPackage ../development/interpreters/ruby/load-ruby-env.nix { };