Is there a way to step through an overridden package’s phases when using flakes? I know you can step through an existing flake’s phases by using nix develop <flake>#<output>. Is there a way to do this for a dependency of the current flake?
As an example:
# flake.nix
{
inputs = {
nixpkgs.url = "github:nixos/nixpkgs/unstable";
utils = {
url = "github:numtide/flake-utils";
inputs.nixpkgs.follows = "nixpkgs";
};
};
outputs = {
self,
nixpkgs,
utils,
}: let
out = system: let
pkgs = import nixpkgs { inherit system; };
inherit (pkgs) poetry2nix;
python = pkgs.python39;
pythonEnv = poetry2nix.mkPoetryEnv {
inherit python;
projectDir = ./.;
preferWheels = true;
overrides = poetry2nix.overrides.withDefaults (pyfinal: pyprev: {
soundfile = pyprev.soundfile.overridePythonAttrs (old: {
postPatch = "(do some stuff)";
});
});
};
in {
devShell = pkgs.mkShell {
buildInputs = [pythonEnv];
};
};
in
with utils.lib; eachSystem defaultSystems out;
}
Imagine the soundfile package is having some issues in this flake, and I want to see what my override is doing. I would like to step through the packages phases with my override applied and inspect the directory contents at each phase?
I thought maybe I could set python.pkgs.soundfile as a flake output called soundfile and run nix develop .#soundfile on it, but I get:
error: flake output attribute 'soundfile' is not a derivation
Is there a good way to do this?
Thank you!