diff --git a/acceptance/setup/git/pre-suite/000_EnvSetup.rb b/acceptance/setup/git/pre-suite/000_EnvSetup.rb
index d34f72a2a..e982d0402 100644
--- a/acceptance/setup/git/pre-suite/000_EnvSetup.rb
+++ b/acceptance/setup/git/pre-suite/000_EnvSetup.rb
@@ -1,56 +1,75 @@
 test_name "Setup environment"
 
 step "Ensure Git and Ruby"
 
 require 'puppet/acceptance/install_utils'
 extend Puppet::Acceptance::InstallUtils
 require 'puppet/acceptance/git_utils'
 extend Puppet::Acceptance::GitUtils
 require 'beaker/dsl/install_utils'
 extend Beaker::DSL::InstallUtils
 
 PACKAGES = {
   :redhat => [
     'git',
     'ruby',
     'rubygem-json',
   ],
   :debian => [
     ['git', 'git-core'],
     'ruby',
   ],
   :debian_ruby18 => [
     'libjson-ruby',
   ],
   :solaris => [
     ['git', 'developer/versioning/git'],
     ['ruby', 'runtime/ruby-18'],
     # there isn't a package for json, so it is installed later via gems
   ],
   :windows => [
     'git',
     # there isn't a need for json on windows because it is bundled in ruby 1.9
   ],
 }
 
 install_packages_on(hosts, PACKAGES, :check_if_exists => true)
 
 hosts.each do |host|
   case host['platform']
   when /windows/
-    step "#{host} Install ruby from git"
+    arch = lookup_in_env('WIN32_RUBY_ARCH', 'puppet-win32-ruby', 'x86')
+    step "#{host} Selected architecture #{arch}"
+
+    step "#{host} Loading git commit-ish to use for Windows Ruby"
+    version_defs_file = '../../../../ext/windows/versions.yaml'
+    raise "Unable to find yaml config at #{version_defs_file}:" if ! File.exist?(version_defs_file)
+
+    begin
+      require 'yaml'
+      @version_defs ||= YAML.load_file(version_defs_file)
+    rescue Exception => e
+      STDERR.puts "Unable to load yaml from #{version_defs_file}:"
+      STDERR.puts e
+      raise
+    end
+
+    revision = @version_defs['git_dependencies'][arch]['puppet_win32_ruby_sha']
+    raise "Could not find #{arch} architecture git revision for puppet-win32-ruby in #{version_defs_file}" if revision.nil?
+
+    step "#{host} Install ruby from git - revision #{revision}"
     # TODO remove this step once we are installing puppet from msi packages
     install_from_git(host, "/opt/puppet-git-repos",
                      :name => 'puppet-win32-ruby',
                      :path => build_giturl('puppet-win32-ruby'),
-                     :rev  => '1.9.3')
+                     :rev => revision)
     on host, 'cd /opt/puppet-git-repos/puppet-win32-ruby; cp -r ruby/* /'
     on host, 'cd /lib; icacls ruby /grant "Everyone:(OI)(CI)(RX)"'
     on host, 'cd /lib; icacls ruby /reset /T'
     on host, 'ruby --version'
     on host, 'cmd /c gem list'
   when /solaris/
     step "#{host} Install json from rubygems"
     on host, 'gem install json'
   end
 end
diff --git a/ext/windows/versions.yaml b/ext/windows/versions.yaml
new file mode 100644
index 000000000..17d3408c5
--- /dev/null
+++ b/ext/windows/versions.yaml
@@ -0,0 +1,7 @@
+# pin to specific versions of puppet-win32-ruby repository
+# these vendored bits are used by packaging and acceptance tests
+git_dependencies:
+  x86:
+    puppet_win32_ruby_sha: '1.9.3-x86'
+  x64:
+    puppet_win32_ruby_sha: '2.0.0-x64'