Seems that using deep (long named) directory for sources (in my case is /zbuilder/src/src-stable-10-clone) produced this error at stage world/kernel install. Probably either some part of Makefiles must be rewritten (from * to find+exec), or MAX_ARGS should be raised (but this will be temporary fix anyway)
For bugs matching the following criteria: Status: In Progress Changed: (is less than) 2014-06-01 Reset to default assignee and clear in-progress tags. Mail being skipped