The current ebuild includes: if use ipv6; then if use amd64; then ewarn "ipv6 in GNUnet does not currently work with amd64 and has been disabled" else myconf="${myconf} --enable-ipv6" fi fi So ./configure will run with neither --enable-ipv6 nor --disable-ipv6 if we have !ipv6. In this case the ipv6 support will be enabled: checking whether to enable ipv6... yes while with --disable-ipv6 we get what we want: checking whether to enable ipv6... no ... configure: NOTICE: IPv6 support will NOT be compiled.
Fixed, thanks