From: Luis Lavena Date: 2011-10-04T08:40:23+09:00 Subject: Re: Error when installing gem. Darryl Pierce wrote in post #1024793: > [...] > > ERROR: While executing gem ... (OptionParser::InvalidOption) > invalid option: --without-qpid-dir=~/Programming/Qpid/builddir/src/ > > What's the problem and what does it expect? gem install -- --with-opt-for-gem=... ^^ Note the double slashes to separate options for RubyGems than the options you provide to the gem installation. All this is detailed in the RubyGems inline help: gem help install -- Luis Lavena -- Posted via http://www.ruby-forum.com/.