dev-util/kbuild-0.1.9998_pre20110817 fails to build without sys-devel/flex installed. Reproducible: Always
Created attachment 283931 [details] build.log
+ 20 Aug 2011; Lars Wendler <polynomial-c@gentoo.org> + kbuild-0.1.9998_pre20110817.ebuild: + Added sys-devel/flex to DEPEND (bug #379889). + Thanks for reporting.