I have a patch to quickpkg to honor the ROOT variable. I use this to package cross-compiled packages from an alternate install location.
Created attachment 79720 [details, diff] Patch to add ROOT support to quickpkg
A note on the patch: the trailing "/" is necessary for the portageq match function. This is because the db key always ends with a "/". The match function should probably be more flexible, but this patch seems reasonable.
done, thanks
Released in 2.1_pre5.