Virtual Acorn was not written to run on Linux, it was written (in my spare time) to run on Windows the platform I'm most used to using. Because of the hard work of others, Virtual Acorn can also be run under a Wine environment on Linux, if that's your OS of choice. Virtual Acorn may well get ported to Linux at some stage but it is not currently high on my list of priorities.
If you have a serious need to Virtual Acorn natively on Linux, you could donate say £10k to pay for my development time to produce a port. Or if you prefer, use ArcEm, do some work on Riscose, or write your own machine emulator.