gitlab bundle failing with psych

# ruby --version
ruby 2.0.0p195 (2013-05-14 revision 40734) [x86_64-linux]

# sudo -u git -H gem env
RubyGems Environment:
  - RUBYGEMS VERSION: 2.0.3
  - RUBY VERSION: 2.0.0 (2013-05-14 patchlevel 195) [x86_64-linux]
  - INSTALLATION DIRECTORY: /home/git/.gem/ruby
  - RUBY EXECUTABLE: /usr/bin/ruby
  - EXECUTABLE DIRECTORY: /home/git/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /home/git/.gem/ruby
     - /usr/share/gems
     - /usr/local/share/gems
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
  - REMOTE SOURCES:
     - https://rubygems.org/

# sudo -u git -H which bundle
/bin/bundle

# sudo -u git -H bundle install --deployment --without development test postgres
Fetching source index from https://rubygems.org/
/usr/share/ruby/yaml.rb:6:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
/usr/share/ruby/yaml.rb:6:in `<top (required)>':
It seems your ruby installation is missing psych (for YAML output).
To eliminate this warning, please install libyaml and reinstall your ruby.
/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:45:in `require': cannot load such file -- psych (LoadError)
        from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:45:in `require'
        from /usr/share/ruby/yaml.rb:7:in `<top (required)>'
        from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:45:in `require'
        from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:45:in `require'
        from /usr/share/rubygems/rubygems.rb:595:in `load_yaml'
        from /usr/share/rubygems/rubygems/config_file.rb:313:in `load_file'
        from /usr/share/rubygems/rubygems/config_file.rb:190:in `initialize'
        from /usr/share/rubygems/rubygems.rb:319:in `new'
        from /usr/share/rubygems/rubygems.rb:319:in `configuration'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/rubygems_integration.rb:34:in `configuration'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/rubygems_integration.rb:53:in `sources='
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/source/rubygems.rb:249:in `ensure in remote_specs'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/source/rubygems.rb:249:in `remote_specs'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/source/rubygems.rb:162:in `fetch_specs'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/source/rubygems.rb:66:in `specs'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/lazy_specification.rb:52:in `__materialize__'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/spec_set.rb:88:in `block in materialize'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/spec_set.rb:85:in `map!'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/spec_set.rb:85:in `materialize'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/definition.rb:114:in `specs'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/definition.rb:109:in `resolve_remotely!'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/installer.rb:83:in `run'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/installer.rb:14:in `install'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/cli.rb:248:in `install'
        from /usr/share/gems/gems/thor-0.17.0/lib/thor/task.rb:27:in `run'
        from /usr/share/gems/gems/thor-0.17.0/lib/thor/invocation.rb:120:in `invoke_task'
        from /usr/share/gems/gems/thor-0.17.0/lib/thor.rb:344:in `dispatch'
        from /usr/share/gems/gems/thor-0.17.0/lib/thor/base.rb:434:in `start'
        from /usr/share/gems/gems/bundler-1.3.1/bin/bundle:20:in `block in <top (required)>'
        from /usr/share/gems/gems/bundler-1.3.1/lib/bundler/friendly_errors.rb:3:in `with_friendly_errors'
        from /usr/share/gems/gems/bundler-1.3.1/bin/bundle:20:in `<top (required)>'
        from /bin/bundle:23:in `load'
        from /bin/bundle:23:in `<main>'

# yum list installed |grep libyaml
libyaml.x86_64                           0.1.4-4.fc19                @fedora
libyaml-devel.x86_64                     0.1.4-4.fc19                @fedora

# yum list installed |grep psych
rubygem-psych.x86_64                     2.0.0-8.fc19                @fedora

# irb
irb(main):001:0> require 'psych'
=> true
irb(main):002:0> Psych.load("%YAML 1.1\n---\n'test'")
=> "test"
irb(main):003:0> require 'yaml'
=> true
irb(main):004:0> YAML.load("%YAML 1.1\n---\n'test'")
=> "test"

# locate psych|grep ruby
/usr/lib64/gems/ruby/psych-2.0.0
/usr/lib64/gems/ruby/psych-2.0.0/lib
/usr/lib64/gems/ruby/psych-2.0.0/lib/psych.so
/usr/share/gems/gems/psych-2.0.0/lib/psych/json/ruby_events.rb
/usr/share/gems/gems/psych-2.0.0/lib/psych/visitors/to_ruby.rb
/usr/share/rubygems/rubygems/psych_additions.rb
/usr/share/rubygems/rubygems/psych_tree.rb

# locate yaml|grep ruby
/usr/share/ruby/yaml
/usr/share/ruby/yaml.rb
/usr/share/ruby/yaml/dbm.rb
/usr/share/ruby/yaml/store.rb

according to "To eliminate this warning, please install libyaml and reinstall your ruby."
# yum reinstall ruby rubygem-bundler
# sudo -u git -H bundle install --deployment --without development test postgres
still same result