diff --git a/dev-ruby/activemodel/Manifest b/dev-ruby/activemodel/Manifest
index b6413d5730637..36a4eb8c10679 100644
--- a/dev-ruby/activemodel/Manifest
+++ b/dev-ruby/activemodel/Manifest
@@ -3,3 +3,4 @@ DIST rails-4.0.13.tgz 3761572 SHA256 a693a8c5f767d153e765634cecb6356855ca51b6554
 DIST rails-4.1.13.tgz 3726822 SHA256 94112f3398c5ffd5e53ce959969c133b35386ade0a9d845eaead4237a5546335 SHA512 8fef27cfbe898fc691562d9a6d543816c3e5c08c4c114b01115024e573b6d49568bca13da9d4574cfe0b76cc778c734e4a24def7047c90fb1c6d1c78553bcee3 WHIRLPOOL 321e60e7f51026e6c79c9f1cf128b349dbab08ed17d8f20fb034f1317c8498edcdaebf166fa30995abc80c6a4cd691408b3b4046adf11086899cd995e94c7d0a
 DIST rails-4.1.14.tgz 3727638 SHA256 c3e8c22e05287f98271dafb7dc512fa25878b65c5bd5d5719216b30e653a3a05 SHA512 94643cef73c0bb0cb8d30295d155a2dece9b2d9a547f7814dffa5e618bc76b7910cb369ac33538fb7be8efb728ea4dd87f6bdf30d2b7cbea2c401509e6de5b71 WHIRLPOOL 4d5bce5a73ecb71f2d4244076295b5ad1a04bc67c7b488bd0145127e26bb7fcc31f4de74307e3ace2756d809c44c7ddbd79411fdad40f5a65e1e79a2a861a67b
 DIST rails-4.2.4.tgz 4166672 SHA256 cc6618eaa2c640932e803dfac6bbde135fad3a6874dfc4e547712ec9182241d4 SHA512 7ce9fabdd302ce8fd1077147e6e45926ba12aa4177d2e1b78775a8fb3b80420f09c4076ecf726f410610a38187f2a8abeaff3d2b1de25e8386685db998bd2308 WHIRLPOOL 0e7bce539ba3c20f5c7de965af478505d76ebad0fd42498b13cb9a9c576304ad9694dd218bc6debf7a02cb437bebc5f75425c104956d32f4afefd1cc2c020d8d
+DIST rails-4.2.5.tgz 4174680 SHA256 adda75f10fc4b7eb498ae9a2b04cb92bd69568fc1a9d6ace27cc1ab203af5a2e SHA512 808d7eaf135f3f6b4b504372615b42e4b7c7f9fa0acdd2c425c9548852d24f143ad3abb38aa95d99212f9198f5a04dda2a6312f3e2d5e9a63173388cb30736e1 WHIRLPOOL f1e8af458b6a922bdb4a214476b145a5e743603ae0ad7b977a8917f9204028cce4da3ee1780118b555924af74319f81d83c42390fc35d010ba881fa03bb30d55
diff --git a/dev-ruby/activemodel/activemodel-4.2.5.ebuild b/dev-ruby/activemodel/activemodel-4.2.5.ebuild
new file mode 100644
index 0000000000000..465c90bd81030
--- /dev/null
+++ b/dev-ruby/activemodel/activemodel-4.2.5.ebuild
@@ -0,0 +1,44 @@
+# Copyright 1999-2015 Gentoo Foundation
+# Distributed under the terms of the GNU General Public License v2
+# $Id$
+
+EAPI=5
+
+USE_RUBY="ruby20 ruby21"
+
+RUBY_FAKEGEM_TASK_DOC=""
+RUBY_FAKEGEM_DOCDIR=""
+RUBY_FAKEGEM_EXTRADOC="CHANGELOG.md README.rdoc"
+
+RUBY_FAKEGEM_GEMSPEC="activemodel.gemspec"
+
+inherit ruby-fakegem versionator
+
+DESCRIPTION="A toolkit for building modeling frameworks like Active Record and Active Resource"
+HOMEPAGE="https://github.com/rails/rails"
+SRC_URI="https://github.com/rails/rails/archive/v${PV}.tar.gz -> rails-${PV}.tgz"
+
+LICENSE="MIT"
+SLOT="$(get_version_component_range 1-2)"
+KEYWORDS="~amd64 ~arm ~ppc ~ppc64"
+IUSE=""
+
+RUBY_S="rails-${PV}/${PN}"
+
+ruby_add_rdepend "
+	~dev-ruby/activesupport-${PV}:*
+	>=dev-ruby/builder-3.1:* =dev-ruby/builder-3*:*
+"
+
+ruby_add_bdepend "
+	test? (
+		>=dev-ruby/railties-4.2.0
+		dev-ruby/test-unit:2
+		>=dev-ruby/mocha-0.14.0:0.14
+		>=dev-ruby/bcrypt-ruby-3.1.7
+	)"
+
+all_ruby_prepare() {
+	# Set test environment to our hand.
+	sed -i -e '/load_paths/d' test/cases/helper.rb || die "Unable to remove load paths"
+}