Support usage of mkPoetryEnv in dev-shell.nix evaluated by nix shell .#devShells.x86_64-linux.default

[jtara1]

Describe the issue

I'm unable to build a shell defined by a module in my package flake.nix.

Error:

$ nix shell .#devShells.x86_64-linux.default
error: builder for '/nix/store/bjhx3gjy6650ny4sh8md38wvc2j87pd2-interactive-python3-3.12.4-environment.drv' failed with exit code 1;
       last 10 log lines:
       > calling 'envHostTargetHook' function hook 'bintoolsWrapper_addLDVars' /nix/store/gps9qrh99j7g02840wv5x78ykmz30byp-strip.sh
       > calling 'envHostTargetHook' function hook 'ccWrapper_addCVars' /nix/store/62zpnw69ylcfhcpy1di8152zlzmbls91-gcc-wrapper-13.3.0
       > calling 'envHostTargetHook' function hook 'bintoolsWrapper_addLDVars' /nix/store/62zpnw69ylcfhcpy1di8152zlzmbls91-gcc-wrapper-13.3.0
       > calling 'envHostTargetHook' function hook 'ccWrapper_addCVars' /nix/store/pg90p34kys2famxnq7925sbgj4jrnsi8-binutils-wrapper-2.42
       > calling 'envHostTargetHook' function hook 'bintoolsWrapper_addLDVars' /nix/store/pg90p34kys2famxnq7925sbgj4jrnsi8-binutils-wrapper-2.42
       > calling 'envHostTargetHook' function hook 'ccWrapper_addCVars' /nix/store/4prjbnvjp40kkqjds62ywy9sr94j9g4b-hello-2.12.1
       > calling 'envHostTargetHook' function hook 'bintoolsWrapper_addLDVars' /nix/store/4prjbnvjp40kkqjds62ywy9sr94j9g4b-hello-2.12.1
       >
       > *** Python 'env' attributes are intended for interactive nix-shell sessions, not for building! ***
       >
       For full logs, run 'nix log /nix/store/bjhx3gjy6650ny4sh8md38wvc2j87pd2-interactive-python3-3.12.4-environment.drv'.

Additional context

dev-shell.nix

{
  pkgs ? import <nixpkgs> {},
  poetry2nix
}:
let
  myAppEnv = poetry2nix.mkPoetryEnv {
    projectDir = ./.;
    editablePackageSources = {
      my-app = ./src;
    };
  };
in myAppEnv.env.overrideAttrs (oldAttrs: {
  buildInputs = [ pkgs.hello ];
})

flake.nix

{
  inputs.nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable-small";
  inputs.poetry2nix.url = "github:nix-community/poetry2nix";
  inputs.poetry2nix.inputs.nixpkgs.follows = "nixpkgs";

  outputs = { self, nixpkgs, poetry2nix }:
  let
    system = "x86_64-linux";

    pkgs = import nixpkgs {
      inherit system;
    };

    lib = nixpkgs.lib;
    config = nixpkgs.config;

    p2n = (poetry2nix.lib.mkPoetry2Nix { inherit pkgs; });
    mkPoetryApplication = p2n.mkPoetryApplication;

    dev-shell = import ./dev-shell.nix { inherit pkgs; poetry2nix = p2n; };
  in {
    devShells.x86_64-linux.default = dev-shell;
  };
}