NIx Flake Example

default.nix

{ lib
, llvmPackages
, cmake }:

llvmPackages.stdenv.mkDerivation rec {
  pname = "rust";
  version = "0.1.0";

  src = ./.;

  # nativeBuildInputs = [ cmake ];
  # buildInputs = [ ];

  # cmakeFlags = [
  #   "-DENABLE_TESTING=OFF"
  #   "-DENABLE_INSTALL=ON"
  # ];

  meta = with lib; {
    homepage = "https://github.com/*/*";
    description = ''
      Just a package
    '';
    licencse = licenses.mit;
    platforms = with platforms; linux ++ darwin;

    maintainers = [
      {
        name = "Sokhibjon Orzikulov";
        email = "sakhib@orzklv.uz";
        handle = "orzklv";
        github = "orzklv";
        githubId = 54666588;
        keys = [{
          fingerprint = "00D2 7BC6 8707 0683 FBB9  137C 3C35 D3AF 0DA1 D6A8";
        }];
      }
    ];
  };
}

flake.nix

{
  description = "A very basic flake";

  inputs = {
    nixpkgs.url = "github:NixOS/nixpkgs/nixpkgs-unstable";
    utils.url = "github:numtide/flake-utils";
  };

  outputs = { self, nixpkgs, ... }@inputs: inputs.utils.lib.eachSystem [
    "x86_64-linux" "aarch64-linux" "x86_64-darwin" "aarch64-darwin"
  ] (system: let
    pkgs = import nixpkgs {
      inherit system;

      overlays = [];

      # config.allowUnfree = true;
    };
  in {
    devShells.default = pkgs.mkShell rec {
      name = "rust";

      packages = with pkgs; [
        rustc
        cargo
        rustfmt
        rust-analyzer
      ];

      shellHook = let
        icon = "f121";
      in ''
        export PS1="$(echo -e '\u${icon}') {\[$(tput sgr0)\]\[\033[38;5;228m\]\w\[$(tput sgr0)\]\[\033[38;5;15m\]} (${name}) \\$ \[$(tput sgr0)\]"
      '';
    };

    packages.default = pkgs.callPackage ./default.nix {};
  });
}