compiling error: xauth not found

[J Horacio MG <homega@ciberia.es>]

I'm trying to compile ssh1 and found the following error while
running ./configure.  I su'ed root and copied the tarball to /usr/local:

$ su
...
/usr/local/ssh-1.2.27# ./configure
...
checking for xauth... no
configure: error: configuring with X but xauth not found - aborting

Since there's no xauth, but .Xauthority in Debian, how do I tell the
configure script about this?

BTW, I know there is a ssh1 deb package, and even a ssh2 deb package,
but I'd like to do it by hand.

TIA
-- 
Horacio
homega@ciberia.es
Valencia - ESPAÑA