[9fans] plan9port build failure on Linux (debian)

[David Morris <lists@morris-clan.net>]

I am trying to install plan9port on a Linux system (Debian),
and am getting the following error:

    9 yacc -d -s bc bc.y

     fatal error:can't create , <nil>:1
    mk: 9 yacc -d ...  : exit status=exit(1)
    mk: for i in ...  : exit status=exit(1)

Everything compiles just fine up to this point with no
errors.  This looks to be the first step of building the
lexx application.  Because there is no filename listed in
the error message, I am guessing this is the result of a bug
in the code or the makefile (err, mkfile, I suppose).

Any idea of what the problem is?  Or if its a bug in the
code, where I can get a stable version?

Details of my build environment and my install process
follow....

OS  : Debian lenny (with a few packages from sid (unstable))
Arch: i386

plan9port version:
    downloaded Saturday from http://swtch.com/plan9port/
    After bug, updated from CVS

Install location: /usr/local

Install process:
    # cd /usr/local
    # sudo tar xvzf plan9port.tgz
    # cd plan9
    # sudo ./INSTALL
    (failed with noted error)
    # sudo cvs update -dP
    # sudo ./INSTALL
    (failed with noted error)

Thanks,

--David