1.9.3-p327@global|drr:~ $ mkdir vf
1.9.3-p327@global|drr:~ $ cd vf
1.9.3-p327@global|drr:~/vf $ echo "flavor 'fakeclip'" > VimFlavor
1.9.3-p327@global|drr:~/vf $ vim-flavor install
/home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/versionconstraint.rb:25:in `parse': uninitialized constant Vim::Flavor::VersionConstraint::Version (NameError)
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/versionconstraint.rb:10:in `initialize'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/flavorfile.rb:50:in `new'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/flavorfile.rb:50:in `flavor'
from /home/drr/vf/VimFlavor:1:in `load'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/flavorfile.rb:31:in `instance_eval'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/flavorfile.rb:31:in `load'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/flavorfile.rb:25:in `load'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/facade.rb:47:in `install_or_upgrade'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/facade.rb:7:in `install'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/lib/vim-flavor/cli.rb:15:in `install'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/thor-0.17.0/lib/thor/task.rb:27:in `run'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/thor-0.17.0/lib/thor/invocation.rb:120:in `invoke_task'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/thor-0.17.0/lib/thor.rb:344:in `dispatch'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/thor-0.17.0/lib/thor/base.rb:434:in `start'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/gems/vim-flavor-1.1.1/bin/vim-flavor:3:in `<top (required)>'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/bin/vim-flavor:23:in `load'
from /home/drr/.rbenv/versions/1.9.3-p327/gemsets/global/bin/vim-flavor:23:in `<main>'
1.9.3-p327@global|drr:~/vf $
I'll let the backtrace talk :)