Debian and Ubuntu already have a package named "tachyon":
Parallel/Multiprocessor Ray Tracing Software
which has been in Debian since 2008, and apparently was started in 1994.
Because this package has a higher version number (0.99~b2+dfsg-0.4) it will always take precedence to the Bigtop "tachyon" package, and on upgrades this will cause chaos.
Maybe the package should be named tachyon-java or apache-tachyon instead to avoid upgrade problems?