Hello. How am I supposed to use makeRustPlatform? I have code like this:

      msrv_toolchain = pkgs.pkgsBuildHost.rust-bin.fromRustupToolchainFile ./rust-toolchain.toml;
      rustPlatform = pkgs.makeRustPlatform {
        cargo = msrv_toolchain;
        rustc = msrv_toolchain;
      };
...
    mypackage = pkgs.callPackage mkThing { inherit rustPlatform };

and I am getting an error that says

  error: attribute 'buildPackage' missing
       at /nix/store/njnqqp2qgx2jfzk8jbfxghhm8x3gb4vl-source/flake.nix:37:7:
           36|     in
           37|       rustPlatform.buildPackage {

The package is just something like

    {
      pkgs,
      rustPlatform,
      ...
    }:
      rustPlatform.buildPackage {
          ...
      }

In reply to @marcel:envs.net
Do you mean something like that?
https://github.com/dd-ix/sflow_exporter/blob/main/package.nix#L8

but ultimately rustc's build system needs to be fixed by someone

In reply to @qyliss:fairydust.space
there's not even anything in the compiler that needs to be fixed, just its build system

In reply to @qyliss:fairydust.space
IIRC the problem was that it didn't accomodate the possibility that you'd be building std and no_std targets at the same time.

In reply to @emilazy:matrix.org
Alyssa Ross: does this look like anything familiar? https://hydra.nixos.org/build/288008080/nixlog/1 looks like it broke when the useFetchCargoVendor cycle landed

finalAttrs.cargoDeps.patches is no longer valid (maybe null, idk can't check rn), since patches gets passed into cargoDeps.vendorStaging

there should probably be a way to pass attrs to the non-staging drv. Though, in this case we actually need to pass to the staging FOD.
So the fix is probably just using finalAttrs.cargoDeps.vendorStaging.patches