From b046ebbb7ccaa023f874f6359ad60441ac00f241 Mon Sep 17 00:00:00 2001
From: zimbatm <zimbatm@zimbatm.com>
Date: Mon, 29 Aug 2016 19:52:40 +0100
Subject: [PATCH 1/2] rubygems: 2.6.2 -> 2.6.6

---
 pkgs/development/interpreters/ruby/rubygems-src.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/interpreters/ruby/rubygems-src.nix b/pkgs/development/interpreters/ruby/rubygems-src.nix
index fea749e7de0..59b2becdc6e 100644
--- a/pkgs/development/interpreters/ruby/rubygems-src.nix
+++ b/pkgs/development/interpreters/ruby/rubygems-src.nix
@@ -1,6 +1,6 @@
 { fetchurl
-, version ? "2.6.2"
-, sha256 ? "1j02ajici555f35vd6ky6m4bxs8lh8nqb1c59qqib4jp4ibcv6zy"
+, version ? "2.6.6"
+, sha256 ? "0x0ldlwr627d0brw96jdbscib6d2nk19izvnh8lzsasszi1k5rkq"
 }:
 fetchurl {
   url = "http://production.cf.rubygems.org/rubygems/rubygems-${version}.tgz";

From a7cf555e2a744403817bfe2647c030eaa2cd66c7 Mon Sep 17 00:00:00 2001
From: zimbatm <zimbatm@zimbatm.com>
Date: Mon, 29 Aug 2016 22:12:44 +0100
Subject: [PATCH 2/2] buildRubyGem: handle build-time ruby dependencies

For some reason `gem install` unsets the GEM_PATH environment variable
internally unless the install dir is provided. This in turn means that
if it invokes extconf.rb and extconf.rb depends on a gem available on
the GEM_PATH (like pkg-config for nokogiri) then it's not available in
that context.

Proof: https://github.com/rubygems/rubygems/blob/d8293c472966cb1de08784dfdd90560e56ceed84/lib/rubygems/commands/install_command.rb#L151
Blame: https://github.com/rubygems/rubygems/commit/9ea600c9c2b77d1459526fe1e2bcdf2ac778c24a

This is a hack that sets the :install_dir to where we would install
anyways (the GEM_HOME is the default installation destination).
---
 pkgs/development/ruby-modules/gem/default.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/pkgs/development/ruby-modules/gem/default.nix b/pkgs/development/ruby-modules/gem/default.nix
index 8015fb1f6d0..347c4a79c59 100644
--- a/pkgs/development/ruby-modules/gem/default.nix
+++ b/pkgs/development/ruby-modules/gem/default.nix
@@ -181,6 +181,7 @@ stdenv.mkDerivation (attrs // {
       --force \
       --http-proxy 'http://nodtd.invalid' \
       --ignore-dependencies \
+      --install-dir "$GEM_HOME" \
       --build-root '/' \
       --backtrace \
       ${documentFlag} \