macOS linker: @executable_path is not correctly resolved

[michal-z]

Zig Version

0.11.0-dev.2160+49d37e2d1

Steps to Reproduce and Observed Behavior

git clone https://github.com/michal-z/zig-gamedev.git
cd zig-gamedev
zig build minimal_gl-run

Sample application uses rpath to load private framework like below:
exe.addRPath("@executable_path/Frameworks");

It looks like @executable_path is not resolved to the correct path.

Expected Behavior

Sample application works correctly (opens blue window).