Hey Ivan,
You'll need to run `bundle install --without test`, which should get
you all set for normal usage of the compression script.
I've also updated the output from the script (
https://github.com/
joshuaclayton/blueprint-css/commit/
9bf9513439d8fbc53814a398f3f9060f42dd4eda) to be a lot more help so
other users won't have the same problems you did.
Let me know if that doesn't help!