iron.io ghostscript .worker error

ghostscript_error

$ iron_worker upload pdf_processor.worker
------> Creating client
NOTICE: Please install 'typhoeus' gem or upgrade to Ruby 2.X for optimal performance.
        Project 'onstage - development' with id='51d0807bed3d763e72003fc4'
------> Creating code package
        Found workerfile with path='pdf_processor.worker'
/Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/lib/iron_worker_ng/code/base.rb:85:in `eval': (eval):6: unknown regexp options - rrr (SyntaxError)
(eval):6: unknown regexp option - a
(eval):6: no .<digit> floating literal anymore; put 0 before dot
...in/g/ghostscript/ghostscript_9.05~dfsg-0ubuntu4_amd64.deb
...                               ^
(eval):6: syntax error, unexpected tINTEGER
.../g/ghostscript/ghostscript_9.05~dfsg-0ubuntu4_amd64.deb
...                               ^
  from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/lib/iron_worker_ng/code/base.rb:85:in `block (2 levels) in initialize'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/lib/iron_worker_ng/fetcher.rb:53:in `call'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/lib/iron_worker_ng/fetcher.rb:53:in `fetch'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/lib/iron_worker_ng/code/base.rb:75:in `block in initialize'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/lib/iron_worker_ng/code/base.rb:74:in `each'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/lib/iron_worker_ng/code/base.rb:74:in `initialize'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/lib/iron_worker_ng/cli.rb:65:in `new'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/lib/iron_worker_ng/cli.rb:65:in `upload'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/gems/iron_worker_ng-0.16.4/bin/iron_worker:112:in `<top (required)>'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/bin/iron_worker:19:in `load'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/bin/iron_worker:19:in `<main>'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/bin/ruby_noexec_wrapper:14:in `eval'
	from /Users/captainproton/.rvm/gems/ruby-1.9.3-p392@onstage2/bin/ruby_noexec_wrapper:14:in `<main>'