For the convenience of others in this thread:
I took Arch's package ([1], via [2], extracted it in /opt, and put a
symlink in /usr/local/bin. Works fine with openjdk-11-jre-headless.
(Perhaps something similar could be done to re-start the Java dependency
loop referenced in the blocking bug[3]?)
Ad 1: https://www.archlinux.org/packages/community/x86_64/ghidra/
Ad 2: "wget
https://www.archlinux.org/packages/community/x86_64/ghidra/download/";
Ad 3: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=926714
