working_dir doesn't work

[MrFoxPro]

process-compose.dev = {
  debug = true;
  tui = false;
  settings = {
    processes = {
      web = {
        command = "echo $PWD";
        working_dir = with {p = toString ./api;}; builtins.trace p p;
      };
    };
  };
};

output:

processes:
  web:
    command: echo $PWD
    working_dir: /nix/store/3cb5iy8l8hffi5cpmxx3dm2sx7gfk4a1-source/api
shell:
  shell_argument: -c
  shell_command: /nix/store/mh1c3p23xby3chc3q0c0g78fa1nn65yw-bash-5.2-p15/bin/bash
[web_1  ] /home/foxpro/craft/sferadel/next

It doesn't work even with under $HOME:

web = {
  command = "bash -c \"echo $PWD; (cd /home/foxpro/craft/sferadel/next/api; echo $PWD)\"";
  working_dir = "/home/foxpro/craft/sferadel/next/api";
};

processes:
  web:
    command: bash -c "echo $PWD; (cd /home/foxpro/craft/sferadel/next/api; echo $PWD)"
    working_dir: /home/foxpro/craft/sferadel/next/api
shell:
  shell_argument: -c
  shell_command: /nix/store/mh1c3p23xby3chc3q0c0g78fa1nn65yw-bash-5.2-p15/bin/bash
[web_1  ] /home/foxpro/craft/sferadel/next
[web_1  ] /home/foxpro/craft/sferadel/next

[MrFoxPro]

Hm, it's working when running from package, but not from shell:

web = {
  command = pkgs.nuenv.mkSimpleScript "cmd.nu" "print 'HI'; print $env.PWD ";
  working_dir = "/home/foxpro/craft/sferadel/next/api";
};

processes:
  web:
    command: /nix/store/26y922y4rdvf8hhwarqi7n50izmndjbz-cmd.nu/bin/cmd.nu
    working_dir: /home/foxpro/craft/sferadel/next/api
shell:
  shell_argument: -c
  shell_command: /nix/store/mh1c3p23xby3chc3q0c0g78fa1nn65yw-bash-5.2-p15/bin/bash
[web_1  ] HI
[web_1  ] /home/foxpro/craft/sferadel/next/api