CBUILD=.. abuild rootbld does not create ~/packages/$repo/$arch
the rootpkg later fails with
>>> zip*: Create zip-3.0-r10.apk
/usr/bin/abuild: cd: line 1830: can't cd to /home/demon/packages//main/aarch64: No such file or directory
>>> ERROR: zip: rootbld failed
because the aarch64 dir does not exist. making it makes it pass and work. this is purely an issue for CBUILD= with rootbld