Hey @vinodkr,
Welcome to our community forums! 
I tried to reproduce your issue locally, same OS and ARCH, with no luck.
Unfortunately (or not), it worked for me.
So, I pinged the folks on the team that owns this tool to have a look at this thread.
Hopefully they’ll eventually get you with some assistance 
Btw, I don’t think xk6 version is a valid command.
Anyway, it should find xk6 and through and error from there. Don’t what’s going on with the installation.