$ ruby /Users/louis.dionmarcil/Tools/autochrome/autochrome.rb --list-themes
Ignoring http_parser.rb-0.8.0 because its extensions are not built. Try: gem pristine http_parser.rb --version 0.8.0
Traceback (most recent call last):
        7: from /Users/louis.dionmarcil/Tools/autochrome/autochrome.rb:102:in `<main>'
        6: from /Users/louis.dionmarcil/Tools/autochrome/autochrome.rb:95:in `parse_options'
        5: from /Users/louis.dionmarcil/.rbenv/versions/2.6.0/lib/ruby/2.6.0/optparse.rb:1553:in `order'
        4: from /Users/louis.dionmarcil/.rbenv/versions/2.6.0/lib/ruby/2.6.0/optparse.rb:1562:in `order!'
        3: from /Users/louis.dionmarcil/.rbenv/versions/2.6.0/lib/ruby/2.6.0/optparse.rb:1568:in `parse_in_order'
        2: from /Users/louis.dionmarcil/.rbenv/versions/2.6.0/lib/ruby/2.6.0/optparse.rb:1568:in `catch'
        1: from /Users/louis.dionmarcil/.rbenv/versions/2.6.0/lib/ruby/2.6.0/optparse.rb:1582:in `block in parse_in_order'
/Users/louis.dionmarcil/Tools/autochrome/autochrome.rb:81:in `block (2 levels) in parse_options': uninitialized constant ProfileBuilder (NameError)