[chef] Problem building chef dev environment

[Jeppe Nejsum Madsen <jeppe@ingolfs.dk>]

Ok.

I'll bite the bullet and have forked chef, installed dependencies as  
per the readme, but seem to still miss something:

sudo rake dev:features
(in /Users/jeppe/projects/chef/chef)
rake install
(in /Users/jeppe/projects/chef/chef/chef)
sudo gem install pkg/chef-0.7.5 --no-rdoc --no-ri
ERROR:  Error installing pkg/chef-0.7.5:
        chef requires mixlib-config (>= 1.0.9, runtime)
rake aborted!
Command failed with status (1): [sudo gem install pkg/chef-0.7.5 --no- 
rdoc ...]
/Users/jeppe/projects/chef/chef/chef/Rakefile:45
(See full trace by running task with --trace)
rake aborted!
Command failed with status (1): [rake install...]
/Users/jeppe/projects/chef/chef/Rakefile:118
(See full trace by running task with --trace)

I found opscode-mixlib-config on github, but this doesn't seem to  
satisfy the dependency...

Any hints?

/Jeppe