flake-template-hell/templates/rust/flake.nix

{
  description = "Rust Developer Environment";
  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
    rust.url = "github:oxalica/rust-overlay";
  };
  outputs = {
    self,
    nixpkgs,
    rust,
  }: let
    systems = [
      "x86_64-linux"
      "aarch64-linux"
    ];
    forAllSystems = nixpkgs.lib.genAttrs systems;
  in {
    packages = forAllSystems (system: let
      pkgs = import nixpkgs {
        inherit system;
        overlays = [
          (import rust)
        ];
      };
      inherit system;
    in {
      rust-app = pkgs.callPackage ./nix/package.nix {};
      default = self.packages.${system}.rust-app;
    });

    devShells = forAllSystems (system: let
      pkgs = import nixpkgs {
        inherit system;
        overlays = [
          (import rust)
        ];
      };
      inherit system;
    in {
      default = pkgs.callPackage ./nix/shell.nix {
        inherit (self.packages.${system}) rust-app;
      };
    });
  };
}