the error is: resources/icons/scribus.png is not a valid file/directory! icons directory was dropped in the sources and replaced by iconsets directory. that contains two dirs atm, 1_5_0 and 1_5_1. so i suppose the new path should be resources/iconsets/1_5_1/scribus16.png instead.
+ 15 Jun 2015; Justin Lecher <jlec@gentoo.org> scribus-9999.ebuild: + Adopt to current HEAD, bug #551816; use ninja as build engine +