Error: The ‘env’ attribute set cannot contain any attributes passed to derivation.

[ocluf]

When trying to build from source on a M1 pro macbook using the following command:

nix-shell https://github.com/ninegua/ic-nix/releases/latest/download/dfx-env.tar.gz --arg force true

I get the following error:

error: The ‘env’ attribute set cannot contain any attributes passed to derivation. The following attributes are overlapping: NIX_CFLAGS_COMPILE
(use '--show-trace' to show detailed location information)

Operating system: MacOS verntura 13.2.1 nix-shell version: 2.13.3

Based on the conversation in issue https://github.com/ninegua/ic-nix/issues/38 I also tried the following nix.shell.

{ pkgs ? import <nixpkgs> { } }:
let
    ic-nix = pkgs.fetchFromGitHub {
    owner = "ninegua";
    repo = "ic-nix";
    rev = "0c8c6808a88d650b5546a60a073853f6ceae97cc";
    sha256 = "sha256-MiK4vw4TLjXN3VH24+yeUvV7Qy2zbtKr5io/lafXjVA=";
  };
  dfx-env = pkgs.callPackage "${ic-nix}/dfx-env.nix" {
    force = true;
    inherit pkgs ic-nix;
  };
in
dfx-env.overrideAttrs (old: {
  nativeBuildInputs = old.nativeBuildInputs ++ [ pkgs.rustup pkgs.pkg-config pkgs.openssl pkgs.protobuf pkgs.cmake pkgs.cachix pkgs.killall ];
})

but I'm still getting the same error.

[ninegua]

The problem is with using nixos (or nixpkgs) unstable channel. For now, you can manually pin a different channel as described here https://github.com/ninegua/ic-nix/issues/38#issuecomment-1468208928

NOTE: If you are on darwin, you may want to use nixpkgs-22.05-darwin instead of nixos-22.11. This is because nixpkgs 22.11 seems to have a problem building python3...

[ninegua]

I think it is now safe to try nixpkgs-22.11-darwin since the CI on github has passed.