debian/changelog

+jamm (0.3.3-3) unstable; urgency=medium
+
+  * Building with 'project.build.sourceEncoding=UTF-8' to get rid of
+   'build is platform dependent' warning.
+
+ -- Andrius Merkys <merkys@debian.org>  Thu, 12 Dec 2019 06:12:12 -0500
+
 jamm (0.3.3-2) unstable; urgency=medium
 
   * Bumping Standards-Version (no changes).

debian/maven.properties

 # Include here properties to pass to Maven during the build.
 # For example:
 # maven.test.skip=true
-# project.build.sourceEncoding=UTF-8
 
+project.build.sourceEncoding=UTF-8