I did compile backports 4.1.1, added the mt7601u too. I had to patch some things and there are a few more kinks to work out still, but it's doable. Newer backports would require a lot more work due to using the new crypto-functions which have not been backported.

Could you post the log of your compilation stages?
I was unable to build it on a fresh Debian image. I am more get used to Fedora and Kali and would like to use them instead.