libffi net::ftp error

gistfile1.txt

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Failed to fetch source from #source_uri (NameError: uninitialized constant Net::FTP)
Fetcher params:
  source URI:     ftp://sourceware.org/pub/libffi/libffi-3.0.13.tar.gz
  checksum:       45f3b6dbc9ee7c7dfbbbc5feba571529
  local location: /Users/j.alberts/sharedhome/home/Covestic/src/omnibus-shaker/local/cache/libffi-3.0.13.tar.gz
Exception:
  NameError: uninitialized constant Net::FTP
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/fetchers/net_fetcher.rb:151:in `download'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/fetchers/net_fetcher.rb:75:in `fetch'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/software.rb:689:in `fetch'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/project.rb:964:in `block in build_me'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/project.rb:963:in `each'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/project.rb:963:in `build_me'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/cli.rb:72:in `build'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor.rb:359:in `dispatch'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/cli/base.rb:33:in `dispatch'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/cli/deprecated.rb:128:in `dispatch'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/cli.rb:41:in `execute!'
    /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/bin/omnibus:11:in `<top (required)>'
    bin/omnibus:16:in `load'
    bin/omnibus:16:in `<main>'
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/Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/fetchers/net_fetcher.rb:151:in `download': uninitialized constant Net::FTP (NameError)
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/fetchers/net_fetcher.rb:75:in `fetch'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/software.rb:689:in `fetch'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/project.rb:964:in `block in build_me'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/project.rb:963:in `each'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/project.rb:963:in `build_me'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/cli.rb:72:in `build'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor.rb:359:in `dispatch'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/cli/base.rb:33:in `dispatch'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/cli/deprecated.rb:128:in `dispatch'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/lib/omnibus/cli.rb:41:in `execute!'
	from /Users/j.alberts/.rbenv/versions/1.9.3-p448/lib/ruby/gems/1.9.1/bundler/gems/omnibus-ruby-85c6ed8a8248/bin/omnibus:11:in `<top (required)>'
	from bin/omnibus:16:in `load'
	from bin/omnibus:16:in `<main>'