Using `entrypoint` without defining `command` causes eval failure (since #98)

[robinanterior]

Using this flake:

{
  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-25.11";
    systems.url = "systems";
    flake-parts.url = "github:hercules-ci/flake-parts";
    process-compose-flake.url = "github:Platonic-Systems/process-compose-flake";
  };

  outputs = { self, flake-parts, ... }@inputs: flake-parts.lib.mkFlake { inherit inputs; } {
    systems = import inputs.systems;
    imports = [
      inputs.process-compose-flake.flakeModule
      ({ ... }: {
        perSystem = { system, pkgs, ... }: {
          process-compose.foo.settings.processes.hello = {
            entrypoint = [pkgs.stdenv.shell "-c" "${pkgs.hello}/bin/hello; sleep 1000"];
          };
        };
      })
    ];
  };
}

Running it:

$ nix run .#foo
error:
       … while calling the 'derivationStrict' builtin
         at <nix/derivation-internal.nix>:37:12:
           36|
           37|   strict = derivationStrict drvAttrs;
             |            ^
           38|

       … while evaluating derivation 'foo'
         whose name attribute is located at /nix/store/l04691r5xf6gj386nd8qqigdk29is7yd-source/pkgs/stdenv/generic/make-derivation.nix:541:13

       … while evaluating attribute 'text' of derivation 'foo'
         at /nix/store/l04691r5xf6gj386nd8qqigdk29is7yd-source/pkgs/build-support/trivial-builders/default.nix:129:13:
          128|           inherit
          129|             text
             |             ^
          130|             executable

       … while evaluating the option `perSystem.aarch64-darwin.process-compose.foo.outputs.settingsFile':

       … while evaluating definitions from `/nix/store/xn4p4nhddsczgq35nzfv12j00pzxmhig-source/nix/process-compose/settings':

       … while evaluating the option `perSystem.aarch64-darwin.process-compose.foo.settings.processes.hello.command':

       (stack trace truncated; use '--show-trace' to show the full, detailed trace)

       error: The option `perSystem.aarch64-darwin.process-compose.foo.settings.processes.hello.command' was accessed but has no value defined. Try setting the option.

Expected output: a process-compose process with the "hello" program.

I assume this is related to the work done in #98

EDIT: expected this to work based on the docs for "entrypoint" which say:

     Specifies the process command as a list of arguments. 
     Overridden by the command option if it is present. 

Which suggests the point of entrypoint is to exist without command specified. I will say, it's a bit of a departure from the docker-compose semantics of entrypoint, which is to be combined with the "command", and both command and entrypoint can be defined either as a string or as an array of strings, but afai understand that's a process-compose concern and not a process-compose-flake concern, so it's unrelated to this particular issue. This issue is based purely on the process-compose-flake documentation of the "entrypoint" option. Is that a correct interpretation?