Some files have been removed from the upstream source:

 * platforms/
    Contains files used for building on other platforms and are not relevant
    for Debian.
 * resources/music/
    The sample music modules are licensed under the CC-BY-SA-NC 3.0 license
    which does not permit commercial use and are therefore not allowed to be
    included in the main Debian archive.

 -- James Cowgill <jcowgill@debian.org>  Thu, 13 Apr 2017 20:34:27 +0100