Users-MacBook-Pro:~ user$ fpm --help
/Library/Ruby/Gems/2.0.0/gems/ffi-1.9.10/lib/ffi/library.rb:133:in `block in ffi_lib': Could not open library 'libc.dylib': dlopen(libc.dylib, 5): image not found (LoadError)
	from /Library/Ruby/Gems/2.0.0/gems/ffi-1.9.10/lib/ffi/library.rb:100:in `map'
	from /Library/Ruby/Gems/2.0.0/gems/ffi-1.9.10/lib/ffi/library.rb:100:in `ffi_lib'
	from /Library/Ruby/Gems/2.0.0/gems/fpm-1.6.1/lib/fpm/util.rb:8:in `<module:Util>'
	from /Library/Ruby/Gems/2.0.0/gems/fpm-1.6.1/lib/fpm/util.rb:6:in `<top (required)>'
	from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Library/Ruby/Gems/2.0.0/gems/fpm-1.6.1/lib/fpm/package.rb:2:in `<top (required)>'
	from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Library/Ruby/Gems/2.0.0/gems/fpm-1.6.1/lib/fpm.rb:3:in `<top (required)>'
	from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /System/Library/Frameworks/Ruby.framework/Versions/2.0/usr/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:55:in `require'
	from /Library/Ruby/Gems/2.0.0/gems/fpm-1.6.1/bin/fpm:5:in `<top (required)>'
	from /usr/local/bin/fpm:23:in `load'
	from /usr/local/bin/fpm:23:in `<main>'