Created attachment 361106 [details, diff] set luajit as lua package when luajit USE flag enabled This is present in the 0.2.0 ebuild as well.
Thanks for finding typo. Please apply attached patch to 9999 and 0.2.0 ebuilds.
+ 17 Oct 2013; Tom Wijsman <TomWij@gentoo.org> mpv-0.2.0.ebuild, + mpv-9999.ebuild: + Fix up a typo in the luajit conditional configure flag, proxied commit for + Nikoli; fixes bug #488348. ahoka, thank you for reporting this.