This is best described by example: $ equery list 'gentoo*' * Searching for gentoo* ... [IP-] [ ] app-portage/gentoolkit-0.3.0.8-r2:0 [IP-] [ ] app-vim/gentoo-syntax-20130619:0 [I--] [??] sys-kernel/gentoo-sources-3.2.1-r2:3.2.1-r2 [IP-] [ ] sys-kernel/gentoo-sources-3.10.17:3.10.17 [IP-] [ ] sys-kernel/gentoo-sources-3.10.25:3.10.25 $ equery meta 'gentoo*' !!! Invalid atom: 'query.py: find_best(), bestmatch-visible, query=gentoo*, InvalidAtom=null/gentoo*' This causes behavior to be inconsistent within equery and makes things like searching for all packages maintained by a specific herd hard.