Problem enabling debugging symbols on Mac OS Catalina

Hello there!

I was playing around with enabling debugging symbols for a package and bumped into Debug Symbols - NixOS Wiki

So i tried with a simple example:

nix-build -E 'with import <nixpkgs> {}; enableDebugging hello'

This compiles fine, but when I open it with gdb this is what happens:

$ gdb /nix/store/cxd2mxzy6zxsjig914cqcic2afbj3rbq-hello-2.10/bin/hello
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Reading symbols from /nix/store/cxd2mxzy6zxsjig914cqcic2afbj3rbq-hello-2.10/bin/hello...

warning: Could not open OSO archive file "/private/var/folders/9h/0j3p28r17xv2_rd06db5548h0000gn/T/nix-build-hello-2.10.drv-0/hello-2.10/./lib/libhello.a"

warning: `/private/var/folders/9h/0j3p28r17xv2_rd06db5548h0000gn/T/nix-build-hello-2.10.drv-0/hello-2.10/src/hello.o': can't open to read symbols: No such file or directory.
(No debugging symbols found in /nix/store/cxd2mxzy6zxsjig914cqcic2afbj3rbq-hello-2.10/bin/hello)

It appears that the debug info has been installed in temp folder which has since been deleted. Is this process not supported on Mac OS?

Here are some debug infos:

# Mac OS X version: Catalina 10.15.7

$ nix-channel --list

$ ls -l $(readlink -f ~/.nix-defexpr/channels/)
total 0
lrwxr-xr-x 1 arkham wheel 75 Jan  1  1970 home-manager -> /nix/store/njwlw5myd2s5v9dpzl6rg154y05xr7mx-home-manager-20.09/home-manager/
lrwxr-xr-x 1 arkham wheel 60 Jan  1  1970 manifest.nix -> /nix/store/k0f0va5lpfzg6phzwqq5xf839j1wx0gy-env-manifest.nix
lrwxr-xr-x 1 arkham wheel 86 Jan  1  1970 nixpkgs -> /nix/store/9hwyaiaa2inbbs5fwnplvqpxmlfhkcr6-nixpkgs-20.09pre246348.d395190b24b/nixpkgs/

# from
# it looks like the commit is

I’m not sure if this helps since I haven’t played with it, but I saw a post a few days ago that may help: Adding debug symbols to package from nixpkgs - #3 by danieldk