Exaile is an audio player built in GTK which aims to provide the same features as the popular Amarok for KDE. The last stable version is 0.2.13, released on April 2, 2008, which fixes cover art fetching from Amazon.
In order to compile Exaile on Debian Lenny, first make sure you have sources repositories enabled, that is, you have a line which starts with deb-src in your /etc/apt/sources.list file, like the one below:
deb-src ftp://ftp.ro.debian.org/debian/ lenny main contrib non-free
Next, install the necessary dependencies:
apt-get build-dep exaile
Download the source tarball from the official website here, uncompress it, change the current working directory to exaile-0.2.13 (or whatever your package is called) and issue:
The last one as root. Exaile should be now installed in /usr/local/bin/exaile.