I installed crew-sudo v1.1 without chromebrew but it appears to require 'ruby'.
Do I need to install chromebre 'chruby.rb' first?
Also, the install.sh script throws the error:
./install.sh: line 2: CREW_DEST_PREFIX: unbound variable
When the bash '-u' option is set and 'CREW_DEST_PREFIX' is unset.