Zig language stack traces

I like how Zig language stack trace show the lines of code (with a caret):
https://ziglang.org/download/0.3.0/release-notes.html

This is something related:
https://ziglang.org/documentation/0.3.0/#Error-Return-Traces

Does this only work if you’re running on the machine that built it? Or is the source embedded in the executable somehow?