GitLab

FTR:

nix build itself doesn't work on M1

❯ nix build
warning: Git tree '/Users/srid/code/sparkle' is dirty
error: Package ‘sdl2-mixer-1.2.0.0’ in /nix/store/gx2yx1nc9i1q0r7vszcafyv52gmdwnqw-source/pkgs/development/haskell-modules/hackage-packages.nix:248036 is not supported on ‘aarch64-darwin’, refusing to evaluate.

       a) To temporarily allow packages that are unsupported for this system, you can use an environment variable
          for a single invocation of the nix tools.

            $ export NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1

        Note: For `nix shell`, `nix build`, `nix develop` or any other Nix 2.4+
        (Flake) command, `--impure` must be passed in order to read this
        environment variable.

       b) For `nixos-rebuild` you can set
         { nixpkgs.config.allowUnsupportedSystem = true; }
       in configuration.nix to override this.

       c) For `nix-env`, `nix-build`, `nix-shell` or any other Nix command you can add
         { allowUnsupportedSystem = true; }
       to ~/.config/nixpkgs/config.nix.
(use '--show-trace' to show detailed location information)

But the impure build does:

❯ NIXPKGS_ALLOW_UNSUPPORTED_SYSTEM=1 nix --impure build