For a time, I was unable to work with Zilf on Raspberry Pi. On the Raspi OS versions last year it would not compile. An alternative was to use “pure” Arm Debian. I had found that unsatisfactory.
I downloaded the most recent Zilf 0.9 for Arm computers and set it up on my RPi 4 this afternoon. It now works as expected. I was able to compile the sample games and then play them with command line frotz and Gargoyle from the desktop.
Thank you to the Zilf development team!