the semi-standard in the tree is for IUSE=lzma. gtkwave is the only one that does IUSE=xz. $ quse -D lzma xz | awk '{print $1}' local:lzma:app-arch/libarchive: local:lzma:dev-libs/elfutils: local:lzma:gnome-extra/yelp: local:lzma:kde-base/ark: local:lzma:kde-base/kdebase-kioslaves: local:lzma:kde-base/kdelibs: local:lzma:sci-libs/getdata: local:lzma:sys-apps/man: local:lzma:sys-fs/squashfs-tools: local:xz:sci-electronics/gtkwave:
Fixed. Thanks for reporting. + 11 Oct 2010; Thomas Beierlein <tomjbe@gentoo.org> gtkwave-3.3.13.ebuild, + metadata.xml: + Switch IUSE=xz to IUSE=lzma (bug 340003) +