{
  description = "A sisu like parser and document generator";
  inputs = {
    flake-utils.url = "github:numtide/flake-utils";
    nixpkgs.url = "github:nixos/nixpkgs";
    #nixpkgs.url = "/nixpkgs-ra/nixpkgs";
  };
  outputs = { self, nixpkgs, flake-utils }: {
    packages.x86_64-linux.spine =
      let
        pkgs = import nixpkgs {
          system = "x86_64-linux";
        };
        #targetOf = package: "${package.targetPath or "."}/${package.targetName or package.name}";
      in pkgs.stdenv.mkDerivation {
        pname       = "spine";
        version     = "0.11.3";
        description = "A sisu like parser and document generator";
        inherit self;
        src = self;
        shell = ./shell.nix;
        buildPhase = ''
          runHook preBuild
          HOME="$PWD"
          DFLAGS="-O2 -inline"
          for DC_ in dmd ldmd2 gdmd; do
            echo "- check for D compiler $DC_"
            DC=$(type -P $DC_ || echo "")
            if [ ! "$DC" == "" ]; then
              break
            fi
          done
          if [ "$DC" == "" ]; then
            exit "Error: could not find D compiler"
          fi
          echo "$DC_ used as D compiler to build $pname"
          dub build --compiler=$DC --build=release --combined --skip-registry=all
          runHook postBuild
        '';
        checkPhase = ''
          runHook preCheck
          HOME="$PWD"
          dub test --combined --skip-registry=all
          runHook postCheck
        '';
        installPhase = ''
          runHook preInstall
          mkdir -p $out/bin
          install -m755 ./bin/spine $out/bin/spine
          #cp -r bin/spine $out/bin/.
          runHook postInstall
        '';
        postInstall = ''
          echo "$out/share/cgi-bin"
          echo `ls -la $out/bin/spine`
        '';
        nativeBuildInputs = with pkgs; [
          ldc dub
        ];
        buildInputs = with pkgs; [
          sqlite
        ];
     };
     defaultPackage.x86_64-linux = self.packages.x86_64-linux.spine;
  };
}