Redmine

$ rake --trace
rake aborted!
cannot load such file -- set
/home/redmine/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
/home/redmine/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/index.rb:1:in `<top (required)>'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/source/rubygems.rb:165:in `fetch_specs'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/source/rubygems.rb:67:in `specs'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/lazy_specification.rb:52:in `__materialize__'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/spec_set.rb:88:in `block in materialize'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/spec_set.rb:85:in `map!'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/spec_set.rb:85:in `materialize'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/definition.rb:114:in `specs'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/definition.rb:159:in `specs_for'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/definition.rb:148:in `requested_specs'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/environment.rb:18:in `requested_specs'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/runtime.rb:13:in `setup'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler.rb:120:in `setup'
/home/redmine/usr/gems/bundler-1.3.5/lib/bundler/setup.rb:7:in `<top (required)>'
/home/redmine/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:110:in `require'
/home/redmine/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:110:in `rescue in require'
/home/redmine/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:35:in `require'
/home/redmine/opt/redmine-2.3/config/boot.rb:6:in `<top (required)>'
/home/redmine/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
/home/redmine/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
/home/redmine/opt/redmine-2.3/config/application.rb:1:in `<top (required)>'
/home/redmine/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
/home/redmine/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
/home/redmine/opt/redmine-2.3/Rakefile:5:in `<top (required)>'
/home/redmine/usr/gems/rake-10.0.4/lib/rake/rake_module.rb:25:in `load'
/home/redmine/usr/gems/rake-10.0.4/lib/rake/rake_module.rb:25:in `load_rakefile'
/home/redmine/usr/gems/rake-10.0.4/lib/rake/application.rb:589:in `raw_load_rakefile'
/home/redmine/usr/gems/rake-10.0.4/lib/rake/application.rb:89:in `block in load_rakefile'
/home/redmine/usr/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling'
/home/redmine/usr/gems/rake-10.0.4/lib/rake/application.rb:88:in `load_rakefile'
/home/redmine/usr/gems/rake-10.0.4/lib/rake/application.rb:72:in `block in run'
/home/redmine/usr/gems/rake-10.0.4/lib/rake/application.rb:160:in `standard_exception_handling'
/home/redmine/usr/gems/rake-10.0.4/lib/rake/application.rb:70:in `run'
/home/redmine/usr/gems/rake-10.0.4/bin/rake:33:in `<top (required)>'
/home/redmine/usr/bin/rake:23:in `load'
/home/redmine/usr/bin/rake:23:in `<main>'

$ ruby -v
ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-linux]

~/opt/redmine-2.3$ gem list

*** LOCAL GEMS ***

actionmailer (3.2.13)
actionpack (3.2.13)
active_support (3.0.0)
activemodel (3.2.13)
activerecord (3.2.13)
activeresource (3.2.13)
activesupport (3.2.13, 3.0.0)
arel (3.0.2)
bigdecimal (1.2.0)
builder (3.0.0)
bundler (1.3.5)
coderay (1.0.9)
erubis (2.7.0)
hike (1.2.2)
i18n (0.6.1)
io-console (0.4.2)
journey (1.0.4)
jquery-rails (2.0.3)
json (1.7.7)
mail (2.5.3)
mime-types (1.23)
minitest (4.3.2)
multi_json (1.7.2)
mysql (2.8.1)
net-ldap (0.3.1)
pg (0.15.1)
polyglot (0.3.3)
psych (2.0.0)
rack (1.4.5)
rack-cache (1.2)
rack-openid (1.3.1)
rack-ssl (1.3.3)
rack-test (0.6.2)
rails (3.2.13)
railties (3.2.13)
rake (10.0.4, 0.9.6)
rdoc (4.0.0, 3.12.2)
rmagick (2.13.2)
ruby-openid (2.1.8)
setup (5.2.0)
sprockets (2.2.2)
sqlite3 (1.3.7)
test-unit (2.0.0.0)
thor (0.18.1)
tilt (1.4.0)
treetop (1.4.12)
tzinfo (0.3.37)

Any ideas?