Due to some recent change in profiles, sci-libs/umfpack can't be built with the metis use flag. But sci-libs/suitesparse-4.0.2.ebuild still has >=sci-libs/umfpack-5.6.1[doc?,metis?]" This should be replaced by >=sci-libs/umfpack-5.6.1[doc?]" With this, I can emerge the recent sci-libs/umfpack-5.6.1-r1 Helmut.
+ 22 Nov 2012; Sébastien Fabbro <bicatali@gentoo.org> metadata.xml, + suitesparse-4.0.2.ebuild: + Support cholmod USE flags. Change umfpack flag according to latest version + (bug #444278) +