Created attachment 677302 [details]
nss fails on crossdev host compiling for amd64
Created attachment 677305 [details]
Wondering if https://gitweb.gentoo.org/repo/gentoo.git/tree/dev-libs/nss/nss-3.59-r1.ebuild?id=d3f2cba10c86d044abad85e9b00b539e365eca8f#n72 is not firing for you...
CBUILD didn't have nss at all so... not sure if that sed would've helped.
sorry I forgot to mention this, but installing nss on CBUILD fixes the problem.
There definitely needs to be a way to tell portage that some packages want themselves to be present in BDEPEND on CBUILD.