diff --git a/dev-ruby/activesupport/Manifest b/dev-ruby/activesupport/Manifest
index 563252c516c8d..3f453af3cff07 100644
--- a/dev-ruby/activesupport/Manifest
+++ b/dev-ruby/activesupport/Manifest
@@ -2,3 +2,4 @@ DIST rails-5.2.4.3.tgz 8824955 BLAKE2B 7db1bdda581e345713b796152c68e13911076c0af
 DIST rails-5.2.4.4.tgz 8825200 BLAKE2B e56f828f46ef72a2ec59006f37410aa53ca33730452d74d8deefc3975a24940500a48864c18523fad1141e025192b8bfc0c050abc04a01a88333fc825640d4b9 SHA512 6ea50009f769e2e2e6df6cd31fb10e8a770c61f28496432cb7a30265f9064fa8e61c8a0c2569fa056baf31d273ab25cc8c9bd02523214a35e3bbd94e4db293e5
 DIST rails-5.2.4.5.tgz 8826076 BLAKE2B 41a13708f72f0c281af7b6c97828d873b9431913315e155bec2f798b83a9fd214a0176a93ba74d96b48718dc900b6737a62f5d6593ef7f5bb0b8430c96e5e234 SHA512 452e0649638daf57e8f7c6131bb048c0d960e875fbc3596678404965fd1438a5151858b22c2441a927509337b6a256671b53c24ee35ff477e18153af358b08af
 DIST rails-6.0.3.4.tgz 18568864 BLAKE2B 8f554a25ce02e4752c1a964257836a5cb0a6c01c3453ff11cd8423a9153e90ab833a32cadfe939a34e094cefd553f5514abd7817004b464b054889ab7dc05b76 SHA512 147f76792ce2d2484071fe247c8f1541c9ca27dcc405ff7a780771e3436a9acf3d326bbfd7c6dceca510b6f4d5209ee0a0859867174b8291d796ffd519fa2ba9
+DIST rails-6.0.3.5.tgz 18566999 BLAKE2B b07d1d6c1e2ebaaf3c337350bb08fe339e324818543dcd7163fe3c7ff56f50c5556f369badeb4fd48afa6d95449e18e57fa1b05db6ce544d38ee2f58bd3aa513 SHA512 c9d6bf689aeb40fb728fb681b65c48ebd51de893060ddac37a1fdefbb0d420cee3a456f148d96d577c651c9d7b994efdb3319fa865cb012af8712052a20a0bf3
diff --git a/dev-ruby/activesupport/activesupport-6.0.3.5.ebuild b/dev-ruby/activesupport/activesupport-6.0.3.5.ebuild
new file mode 100644
index 0000000000000..2283081961c87
--- /dev/null
+++ b/dev-ruby/activesupport/activesupport-6.0.3.5.ebuild
@@ -0,0 +1,73 @@
+# Copyright 1999-2021 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+USE_RUBY="ruby25 ruby26 ruby27"
+
+RUBY_FAKEGEM_EXTRADOC="CHANGELOG.md README.rdoc"
+
+RUBY_FAKEGEM_GEMSPEC="activesupport.gemspec"
+
+RUBY_FAKEGEM_BINWRAP=""
+
+inherit ruby-fakegem
+
+DESCRIPTION="Utility Classes and Extension to the Standard Library"
+HOMEPAGE="https://github.com/rails/rails"
+SRC_URI="https://github.com/rails/rails/archive/v${PV}.tar.gz -> rails-${PV}.tgz"
+
+LICENSE="MIT"
+SLOT="$(ver_cut 1-2)"
+KEYWORDS="~amd64 ~arm ~arm64 ~hppa ~ppc ~ppc64 ~sparc ~x86"
+IUSE=""
+
+RUBY_S="rails-${PV}/${PN}"
+
+ruby_add_rdepend "
+	>=dev-ruby/concurrent-ruby-1.0.2:1
+	dev-ruby/i18n:1
+	>=dev-ruby/tzinfo-1.1:1
+	>=dev-ruby/minitest-5.1:5
+	>=dev-ruby/zeitwerk-2.2:2
+"
+
+# memcache-client, nokogiri, builder, and redis are not strictly needed,
+# but there are tests using this code.
+ruby_add_bdepend "test? (
+	>=dev-ruby/dalli-2.2.1
+	>=dev-ruby/nokogiri-1.4.5
+	>=dev-ruby/builder-3.1.0
+	>=dev-ruby/listen-3.0.5:3
+	dev-ruby/rack
+	dev-ruby/mocha
+	)"
+
+all_ruby_prepare() {
+	# Set the secure permissions that tests expect.
+	chmod 0755 "${HOME}" || die "Failed to fix permissions on home"
+
+	# Remove items from the common Gemfile that we don't need for this
+	# test run. This also requires handling some gemspecs.
+	sed -i -e "/\(system_timer\|sdoc\|w3c_validators\|pg\|execjs\|jquery-rails\|mysql\|journey\|ruby-prof\|stackprof\|benchmark-ips\|kindlerb\|turbolinks\|coffee-rails\|debugger\|sprockets-rails\|redcarpet\|bcrypt\|uglifier\|minitest\|sprockets\|stackprof\|rack-cache\|redis\|sqlite\)/ s:^:#:" \
+		-e '/:job/,/end/ s:^:#:' \
+		-e '/group :doc/,/^end/ s:^:#:' \
+		-e 's/gemspec/gemspec path: "activesupport"/' \
+		-e '5igem "builder"; gem "rack"' ../Gemfile || die
+	rm ../Gemfile.lock || die
+	sed -i -e '1igem "tzinfo", "~> 1.1"' test/abstract_unit.rb || die
+
+	# Avoid test that depends on timezone
+	sed -i -e '/test_implicit_coercion/,/^  end/ s:^:#:' test/core_ext/duration_test.rb || die
+
+	# Avoid tests that seem to trigger race conditions.
+	rm -f test/evented_file_update_checker_test.rb || die
+
+	# Avoid test that generates filename that is too long
+	sed -i -e '/test_filename_max_size/askip "gentoo"' test/cache/stores/file_store_test.rb || die
+
+	# Avoid tests requiring a live redis running
+	rm -f test/cache/stores/redis_cache_store_test.rb || die
+	sed -i -e '/cache_stores:redis/ s:^:#:' Rakefile || die
+	sed -i -e '/test_redis_cache_store/askip "lacking keywords"' test/cache/cache_store_setting_test.rb || die
+}