New libnet-1.0704 creates error

Greetings

I've just downloaded and installed libnet-1.0704.
A script that always worked before now fails.

This is the error message:
The getpwuid function is unimplemented at
c:\Perl\site\5.005\lib/Net/Config.pm line 47

Lines 46 and 47 are:
if ($< == $> and !$CONFIGURE)  {
    my $home = eval { (getpwuid($>))[7] } || $ENV{HOME};

I am running NT 4.

Where does $CONFIGURE get defined?

Any thoughts on how to avoid this error, besides ditching NT 4?

Thanks in advance.

Ron