Building a 1.5 BETA/Atari snapshot after a

    cvs -d .../src/main checkout -rnetbsd-1-5-BETA

into an empty directory failed due to the absence of

    bin/expr/expr.c

It looks like the issue is with the netbsd-1-5-BETA cvs tag:
the expr.c,v in the Attic is tagged, but the main one isn't.
Should I manually check it out and go on w/my build ;-) or
does this warrant more attention?  (Or both...?)

Many thanks,  --Dave