{
  description = "CI, devshell and package definition for learningpulse";
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-unstable";
  };
  outputs = { self, nixpkgs, ... }:
    let
      # TODO add more systems
      system = "x86_64-linux";
      pkgs = import nixpkgs { inherit system; };

      buildPackages = with pkgs; [
        jdk22
        makeWrapper
      ];
    in
    rec {
      packages.${system} =
        {
          learningpulse-gateway = pkgs.maven.buildMavenPackage rec {
            pname = "gateway";
            version = "0.0.1";

            src = ./.;
            # todo get automatically
            mvnHash = "sha256-YCK1Qujgx73cZdEx2mRip+y+66px5TxL247fBIMyoy4=";

            nativeBuildInputs = buildPackages;

            installPhase = ''
              mkdir -p $out/bin $out/share/${pname}
              install -Dm644 ${pname}/target/${pname}-${version}.jar $out/share/${pname}

              makeWrapper ${pkgs.jre8}/bin/java $out/bin/${pname} \
                --add-flags "-jar $out/share/${pname}/${pname}-${version}.jar"
            '';
          };

          learningpulse-eureka = pkgs.maven.buildMavenPackage rec {
            pname = "eureka";
            version = "0.0.1";

            src = ./.;
            # todo get automatically
            mvnHash = "sha256-YCK1Qujgx73cZdEx2mRip+y+66px5TxL247fBIMyoy4=";

            nativeBuildInputs = buildPackages;

            installPhase = ''
              mkdir -p $out/bin $out/share/${pname}
              install -Dm644 ${pname}/target/${pname}-${version}.jar $out/share/${pname}

              makeWrapper ${pkgs.jre8}/bin/java $out/bin/${pname} \
                --add-flags "-jar $out/share/${pname}/${pname}-${version}.jar"
            '';
          };

          learningpulse-dummy = pkgs.maven.buildMavenPackage rec {
            pname = "dummy";
            version = "0.0.1";

            src = ./.;
            # todo get automatically
            mvnHash = "sha256-YCK1Qujgx73cZdEx2mRip+y+66px5TxL247fBIMyoy4=";

            nativeBuildInputs = buildPackages;
            installPhase = ''
              mkdir -p $out/bin $out/share/${pname}
              install -Dm644 ${pname}/target/${pname}-${version}.jar $out/share/${pname}

              makeWrapper ${pkgs.jre8}/bin/java $out/bin/${pname} \
                --add-flags "-jar $out/share/${pname}/${pname}-${version}.jar"
            '';

          };
        };


      hydraJobs = {
        inherit (self)
          packages;
      };

      devShells."${system}".default = pkgs.mkShell {
        buildInputs = with pkgs; [
          maven
          jdk22
          jre8
        ];
      };
    };

}