    Updating crates.io index
    Updating git repository `https://github.com/felixonmars/ring`
    Removing ring v0.16.20
      Adding ring v0.16.20 (https://github.com/felixonmars/ring?branch=0.16.20#cff22b15)
error: process didn't exit successfully: `rustc -vV` (exit status: 127)
--- stderr
/usr/bin/rustc: error while loading shared libraries: libLLVM-12.so: cannot open shared object file: No such file or directory

[1m[31m==> ERROR:[m[1m A failure occurred in prepare().[m
[1m    Aborting...[m