Arises when running
zig fetch --save https://github.com/theseyan/mpack-zig/archive/refs/tags/v0.2.1.tar.gz
The error message suggests a fix:
/home/---------/.cache/zig/tmp/09b3e4242a92913c/mpack-zig-0.2.1/build.zig.zon:2:13: error: name must be a valid bare zig identifier (hint: switch from string to enum literal)
.name = "mpack-zig",
"Switch to an enum literal"
For now, I'm going to use a fork of this repo.