Some packages are doing things like "econf --with-editor=${EDITOR}", thus creating an implicit (i.e. missing from RDEPEND) dependency on the ${EDITOR} package. If that editor package is later removed, or for binpkgs installed on another system, breakage will result. Solution: There is now a package app-editors/gentoo-editor. This will install an auxiliary /usr/libexec/gentoo-editor script that calls ${EDITOR} (determined from the environment or from the system profile) at run time. Necessary ebuild changes: - Add app-editors/gentoo-editor to {,R}DEPEND. - Specify /usr/libexec/gentoo-editor instead of ${EDITOR}. See >=app-admin/sudo-1.7.2_p1-r1 for an example ebuild.
Looks like all blocking bugs have been fixed. Closing.