Help with watch file

["Nelson A. de Oliveira" <naoliv@gmail.com>]

Hi mentors!

I have one watch file with the following lines:

version=3
ftp://ftp.genetics.wustl.edu/pub/eddy/software/squid-(.*)\.tar\.gz

Doing an uscan --verbose, I get:

$ uscan --verbose
-- Scanning for watchfiles in .
-- Found watchfile in ./debian
-- In debian/watch, processing watchfile line:
  ftp://ftp.genetics.wustl.edu/pub/eddy/software/squid-(.*)\.tar\.gz
uscan warning: In debian/watch no matching files for watch line
 ftp://ftp.genetics.wustl.edu/pub/eddy/software/squid-(.*)\.tar\.gz
-- Scan finished

I have tried everything to make this watch file works, but without success :-(

What is the correct line to get versions from a FTP directory, with
files like ftp://ftp.genetics.wustl.edu/pub/eddy/software/squid-1.9g.tar.gz?

Thank you very much!

Nelson