Hello to all, Summary: I have made many mods to sys-app/portage (2013 version). The result is a proposal of patch for latest sys-app/portage, see below. Main result of my mods to gentoo prefix: FEATURES=uncooperative-root emerge -bv =firefox-17 now works on EPREFIX on Android-4.1 ARM. I use neither fakeroot nor GNURoot. root access never required. @dol-sen advised me one week ago on #gentoo-portage to post here a rebased patch for HEAD of git.overlays.gentoo.org/proj/portage.git : I just hosted this patch on sf.net/projects/gentooandroid/files/sys-app_portage-current-HEAD_patch/download and it is also attached to this post. I request comments and discussions about this patch. Summary: pym/portage/const.py + (this is SUPPORTED_FEATURES+=uncooperative-root) cnf/make.conf.example ++++++++++++++++++++++++++ bin/ebuild-helpers/emake ++++++++ bin/ebuild.sh --+++++++ bin/misc-functions.sh -+++++ bin/phase-helpers.sh +++++ My aim is to take your remarks into account, then to build an overlay (will be hosted at endrood.sf.net) with up-to-date versions of all my mods. The final result will be a tested version of above patch, together with lastest builds for firefox, squeak, scala, gnucash, ... Thanks for you attention. Xdej.