"Cannot Load Such File -- Compass" When Using Parker's Compass Generator

[tohuw]

I'm using Parker's Compass SCSS generator plugin, but this seems to cause octopress to error out:

$ octopress ink list
/Users/tohuw/Projects/tohuw.net/_plugins/generator_scss.rb:13:in `require': cannot load such file -- compass (LoadError)
    from /Users/tohuw/Projects/tohuw.net/_plugins/generator_scss.rb:13:in `<top (required)>'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/jekyll-2.5.3/lib/jekyll/plugin_manager.rb:74:in `require'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/jekyll-2.5.3/lib/jekyll/plugin_manager.rb:74:in `block (2 levels) in require_plugin_files'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/jekyll-2.5.3/lib/jekyll/plugin_manager.rb:73:in `each'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/jekyll-2.5.3/lib/jekyll/plugin_manager.rb:73:in `block in require_plugin_files'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/jekyll-2.5.3/lib/jekyll/plugin_manager.rb:72:in `each'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/jekyll-2.5.3/lib/jekyll/plugin_manager.rb:72:in `require_plugin_files'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/jekyll-2.5.3/lib/jekyll/plugin_manager.rb:18:in `conscientious_require'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:79:in `setup'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/jekyll-2.5.3/lib/jekyll/site.rb:41:in `initialize'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/octopress-3.0.11/lib/octopress.rb:68:in `new'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/octopress-3.0.11/lib/octopress.rb:68:in `read_site'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/octopress-3.0.11/lib/octopress.rb:61:in `site'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/octopress-ink-1.1.4/lib/octopress-ink.rb:133:in `list'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/octopress-ink-1.1.4/lib/octopress-ink/commands/list.rb:14:in `block (2 levels) in process_command'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `call'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `block in execute'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `each'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/command.rb:220:in `execute'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary/program.rb:42:in `go'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/mercenary-0.3.5/lib/mercenary.rb:19:in `program'
    from /Users/tohuw/.rbenv/versions/2.2.2/lib/ruby/gems/2.2.0/gems/octopress-3.0.11/bin/octopress:8:in `<top (required)>'
    from /Users/tohuw/.rbenv/versions/2.2.2/bin/octopress:23:in `load'
    from /Users/tohuw/.rbenv/versions/2.2.2/bin/octopress:23:in `<main>'

How can I address this, or is there a better simple way to integrate compass into an Octopress site?

Thanks in advance.