Slib Is listed as a dependency twice in gnucash ebuild file DEPEND="${RDEPEND} >=sys-devel/perl-5 --> >=dev-libs/slib-2.3.8 >=dev-lang/swig-1.3_alpha4 --> >=dev-libs/slib-2.3.8 >=dev-libs/g-wrap-1.1.5 nls? ( sys-devel/gettext )"
I had this fixed in my local tree, just forgotten to commit it.