* some Ruby gems will not install without some manual work before.
* scrypt gem has been remove because of this issues:- <nowiki>https://github.com/pbhogan/scrypt/issues/23</nowiki>
** update there is now a amahi/scrypt that will be used, -msse & -msse2 command line parameters have been removed.
* Nokogiri the An HTML, XML, SAX, & Reader parser with the ability to search documents via XPath. must use '--use-system-libraries'.