SRC_URI in freebsd-cddl-9.1.ebuild is currently following. It is defined as the SYS required in all cases. In addition, SYS is defined also required when enabled USE=build. Because it requires SYS in all cases, I think when enabled USE=build, SYS is not necessary. SRC_URI="mirror://gentoo/${P}.tar.bz2 mirror://gentoo/${CONTRIB}.tar.bz2 mirror://gentoo/${UBIN}.tar.bz2 mirror://gentoo/${LIB}.tar.bz2 mirror://gentoo/${SBIN}.tar.bz2 mirror://gentoo/${SYS}.tar.bz2 build? ( mirror://gentoo/${SYS}.tar.bz2 mirror://gentoo/${INCLUDE}.tar.bz2 )" FYI, Patch for 9.1_rc3 http://git.overlays.gentoo.org/gitweb/?p=proj/gentoo-bsd.git;a=blobdiff_plain;f=sys-freebsd/freebsd-cddl/freebsd-cddl-9.1_rc3.ebuild;h=40ecba6972ddd8f0060759c66df17468bd3c1f80;hp=1477b4e16e18ece9661a03d79947e5dc1889f96c;hb=20ee2feca56ddc00e5f87cb71ebaee85dc341a0a;hpb=ec09909d087c0c703ff0b6eefa6a8fa43178e25c
Dropped. Thanks for your patch.