Ok, did a bit of digging. I'm assuming you're using Linux based on the license path. Try this:
$ <suite_install_dir>/bin/suite_exec bash
$ export ARMCC5_ASMOPT=--tool_variant=ds5eval
$ export ARMCC5_CCOPT=--tool_variant=ds5eval
$ export ARMCC5_FROMELFOPT=--tool_variant=ds5eval
$ export ARMCC5_LINKOPT=--tool_variant=ds5eval
$ armasm --vsn
Replacing "bash" (and correcting for the environment variable command) if required.
> e