Today's "make build" is failed at the middle of cleandir like:

  ...
  cleaning the kern library objects
  cd: can't cd to
  /mnt/src/sys/arch/i386/stand/biosboot/obj/lib/kern
  *** Error code 2
  
  Stop.
  make: stopped in /mnt/src/sys/arch/i386/stand/biosboot
  *** Error code 1
  ...

This cleaning is 2nd time cleaning of the same kern library
objects.  It once removed all objects and "lib/kern"
directory, then it tried clean it again although the
directory is already removed.

To reproduce this error, do following.

  $ cd /usr/src/sys/arch/i386
  $ make distclean

I looked around Makefiles and others, but I couldn't find
the solution for this.  Please check this.  Thanks.

-- Kazushi
Experience is that marvelous thing that enables you recognize a mistake
when you make it again.
		-- F. P. Jones