{
  description = "A script to patch the MonoLisa font with Nerd Fonts glyphs.";

  inputs = {
    nixpkgs.url = "github:nixos/nixpkgs/nixos-unstable";
    alejandra.url = "github:kamadorueda/alejandra";
  };

  outputs = inputs @ {
    self,
    nixpkgs,
    alejandra,
  }: let
    inherit (nixpkgs.lib) genAttrs;
    forAllSystems = f:
      genAttrs
      ["x86_64-linux" "x86_64-darwin" "aarch64-linux" "aarch64-darwin"]
      (system: f nixpkgs.legacyPackages.${system});
  in {
    packages = forAllSystems (
      pkgs:
      with pkgs; {
        default = stdenv.mkDerivation {
        name = "monolisa-nerdfont-patch";
        src = ./.;
        nativeBuildInputs = [ makeWrapper ];
        buildInputs = [
          fontforge
          python3
        ];
        unpackPhase = ":";
        buildPhase = ":";
        installPhase = ''
          mkdir -p $out/bin
          install -m755 -D ${./patch-monolisa} $out/bin/monolisa-nerdfont-patch
          install -m755 -D ${./font-patcher} $out/bin/font-patcher
          cp -r ${./bin} $out/bin/bin
          cp -r ${./src} $out/bin/src
        '';
        postFixup = ''
          wrapProgram $out/bin/monolisa-nerdfont-patch \
            --set PATH ${lib.makeBinPath [
              fontforge
            ]}
          '';
      };
    }
      );

    devShells = forAllSystems (
      pkgs:
        with pkgs; {
          default = mkShell {
            buildInputs = [
              fontforge
              python3
              pre-commit
            ];
          };
        }
    );

    formatter.x86_64-linux = alejandra.packages.x86_64-linux.default;
  };
}