[chef] chef windows annoyance of the day

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"knife cookbook upload getting-started" fails under git bash (Ruby 1.8.7 or
1.9.2):

ERROR: Errno::ENOENT: No such file or directory - ruby -c
c:/chef/chef-repo/.chef/../cookbooks/getting-started/metadata.rb

Works fine when run from standard Windows cmd.exe. Anything I can do to make 
it
work under git bash? The rest of my knife commands are working fine from 
there.