guard/guard

Hi! I'm trying to use the guard-shell plugin to run reek, and Guard-within-Pry is eating (at least) the standard-output stream.

Here's my task definition:

guard :shell do
  watch(%r{^lib/.*/?[^/]+\.rb$})     { |m| "bin/reek -c config.reek --sort-by smelliness #{m[0]}" }
end

and when all tasks run, I get output including

bin/reek -c config.reek --sort-by smelliness lib/crypt_ident/change_password.rb
bin/reek -c config.reek --sort-by smelliness lib/crypt_ident/config.rb
bin/reek -c config.reek --sort-by smelliness lib/crypt_ident/sign_in.rb
bin/reek -c config.reek --sort-by smelliness lib/crypt_ident/sign_out.rb
bin/reek -c config.reek --sort-by smelliness lib/crypt_ident/sign_up.rb
bin/reek -c config.reek --sort-by smelliness lib/crypt_ident/version.rb
bin/reek -c config.reek --sort-by smelliness lib/crypt_ident.rb

so it sees each of my files and invokes the command properly, but I'm not getting any output at all.

I have similar problems running any other command within the shell plugin. Help?