radio-bullshit/ices.xml.jinja

 <!-- <?xml version="1.0"?> -->
 <ices>
   <stream>
     <metadata>
       <name>Radio Bullshit</name>
       <genre>Bullshit</genre>
       <description>J'ai une superbe opportunité de travail</description>
       <url>{{ hostname }}</url>
     </metadata>
     <input>
       <param name="type">script</param>
       <param name="program">next_song.py</param>
     </input>
     <instance>
       <username>{{ source_username }}</username>
       <password>{{ source_password }}</password>
       <mount>/radio-bullshit.ogg</mount>
     </instance>
   </stream>
 </ices>