Unable to satisfy constraints about bamboo HOT 9 CLOSED

$ berks -v
3.1.3
$ ruby -v
ruby 2.0.0p353 (2013-11-22 revision 43784) [x86_64-darwin13.0.2]
$ berks install
Resolving cookbook dependencies...
Fetching 'php' from source at site-cookbooks/php
Fetching cookbook index from http://api.berkshelf.com...
Unable to satisfy constraints on package backup due to solution constraint (bamboo >= 0.0.0). Solution constraints that may result in a constraint on backup: [(bamboo = 1.2.3) -> (backup = 0.2.0)], [(bamboo = 1.1.0) -> (backup = 0.0.5)]
Demand that cannot be met: (bamboo >= 0.0.0)
Artifacts for which there are conflicting dependencies: backup = 0.4.0 -> [(cron >= 0.0.0)]Unable to find a solution for demands: apt (>= 0.0.0), bamboo (>= 0.0.0), build-essential (>= 0.0.0), jolicode-php (>= 0.0.0), nodejs (>= 0.0.0), php (0.1.0), rbenv-install-rubies (>= 0.0.0)

$ berks install
Resolving cookbook dependencies...
Fetching cookbook index from http://api.berkshelf.com...
Unable to satisfy constraints on package backup due to solution constraint (bamboo = 1.2.3). Solution constraints that may result in a constraint on backup: [(bamboo = 1.2.3) -> (backup = 0.2.0)]
Demand that cannot be met: (bamboo = 1.2.3)
Artifacts for which there are conflicting dependencies: backup = 0.4.0 -> [(cron >= 0.0.0)]Unable to find a solution for demands: bamboo (= 1.2.3)

rm -rf ~/.berkshelf