gistfile1.txt

bundler•ruby-1.9.3-p392@bundler•master»» rake spec:deps --trace
rake aborted!
cannot load such file -- rspec/core/rake_task
/Users/jonan/Dropbox/code/bundler/Rakefile:54:in `require'
/Users/jonan/Dropbox/code/bundler/Rakefile:54:in `<top (required)>'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/lib/rake/rake_module.rb:25:in `load_rakefile'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/lib/rake/application.rb:501:in `raw_load_rakefile'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/lib/rake/application.rb:82:in `block in load_rakefile'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/lib/rake/application.rb:81:in `load_rakefile'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/lib/rake/application.rb:65:in `block in run'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/lib/rake/application.rb:133:in `standard_exception_handling'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/lib/rake/application.rb:63:in `run'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/gems/rake-0.9.2.2/bin/rake:33:in `<top (required)>'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/bin/rake:19:in `load'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/bin/rake:19:in `<main>'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/bin/ruby_noexec_wrapper:14:in `eval'
/Users/jonan/.rvm/gems/ruby-1.9.3-p392@bundler/bin/ruby_noexec_wrapper:14:in `<main>'

Sounds like your rake command is somehow loading a Ruby that doesn't have rspec installed?