In reply to @axman6:matrix.org
Is there a non-zero chance of being able to build a python app using pkgsCross.mingwW64? I'm running into issues early on with bash complaining it can't run as a pe executable (seems totally reasonable, but I'm not sure where it's decided it needs to do that)

Or alternatively, any chance of being able to build python things for windows in some form of VM/wine/something

I'm sorry, I'm not quite sure what you mean. I currently have a file that is like

{ pkgs, stdenv, rustPlatform, ...}: stdenv.mkDerivation {
depsBuildBuild = [rustPlatform.rust.rustc rustPlatform.rust.cargo];
...other stuff
}

Which is called from another file with a rust-overlay toolchain using makeRustPlatform. I am wondering if I can change it to

{ pkgs, stdenv, rustPlatform, rust, cargo, ...}: stdenv.mkDerivation {
depsBuildBuild = [rust, cargo];
...other stuff
}

as it keeps yelling at me that using rustPlatform.rust.{rustc, cargo} is deprecated.

In the past month, a rust cross build in my CI broke: https://github.com/NixOS/nixpkgs/issues/384662.

I don't have a lot of rust experience, but experimenting in nix-shell, it seems like cargo isn't understanding that we are attempting to do a cross build.

Any help would be much appreciated :D