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{
  description = "mixxx";
  inputs = {
    nixpkgs.url = "nixpkgs/nixos-23.05";
    unstable-nixpkgs.url = "nixpkgs/nixpkgs-unstable";
    flake-utils = {
      url = "github:numtide/flake-utils";
    };
  };

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

        allLv2Plugins = [
          pkgs.x42-plugins
          pkgs.zam-plugins
          pkgs.rkrlv2
          pkgs.mod-distortion
          pkgs.infamousPlugins
          pkgs.artyFX
        ];

        git-clang-format = pkgs.stdenv.mkDerivation {
          name = "git-clang-format";
          version = "2019-06-21";
          src = pkgs.fetchurl {
            url = "https://raw.githubusercontent.com/llvm-mirror/clang/2bb8e0fe002e8ffaa9ce5fa58034453c94c7e208/tools/clang-format/git-clang-format";
            sha256 = "1kby36i80js6rwi11v3ny4bqsi6i44b9yzs23pdcn9wswffx1nlf";
            executable = true;
          };
          nativeBuildInputs = [
            pkgs.makeWrapper
          ];
          buildInputs = [
            pkgs.clang-tools
            pkgs.python3
          ];
          unpackPhase = ":";
          installPhase = ''
            mkdir -p $out/opt $out/bin
            cp $src $out/opt/git-clang-format
            makeWrapper $out/opt/git-clang-format $out/bin/git-clang-format \
              --add-flags --binary \
              --add-flags ${pkgs.clang-tools}/bin/clang-format
          '';
        };

        shell-configure = pkgs.writeShellScriptBin "configure" ''
          mkdir -p cbuild
          cd cbuild
          cmake .. "$@"
          cd ..
        '';

        shell-build = pkgs.writeShellScriptBin "build" ''
          if [ ! -d "cbuild" ]; then
            >&2 echo "First you have to run configure."
            exit 1
          fi
          cd cbuild
          cmake --build . --parallel $NIX_BUILD_CORES "$@"
          source ${pkgs.makeWrapper}/nix-support/setup-hook
          wrapProgram mixxx --prefix LV2_PATH : ${pkgs.lib.makeSearchPath "lib/lv2" allLv2Plugins}
        '';

        shell-run = pkgs.writeShellScriptBin "run" ''
          if [ ! -f "cbuild/mixxx" ]; then
            >&2 echo "First you have to run build."
            exit 1
          fi
          cd cbuild
          ./mixxx --resourcePath res/ "$@"
        '';

        shell-debug = pkgs.writeShellScriptBin "debug" ''
          if [ ! -f "cbuild/mixxx" ]; then
            >&2 echo "First you have to run build."
            exit 1
          fi
          cd cbuild
          LV2_PATH=${pkgs.lib.makeSearchPath "lib/lv2" allLv2Plugins} gdb --args ./.mixxx-wrapped --resourcePath res/ "$@"
        '';

        libdjinterop = pkgs.stdenv.mkDerivation rec {
          name = "libdjinterop";
          version = "0.19.0";
          src = pkgs.fetchFromGitHub {
            owner = "xsco";
            repo = "libdjinterop";
            rev = version;
            sha256 = "sha256-PJXV1F/QueT/SoEk/Lv18QmhmBByfD4rCO1fSuYdIgA=";
          };

          nativeBuildInputs = with pkgs; [
            git-clang-format
            cmake
            ninja
            pkg-config
          ];

          outputs = [ "out" "dev" ];
          buildInputs = with pkgs; [
            boost
            sqlite
            zlib
          ];
        };

        mixxx = pkgs.stdenv.mkDerivation {
          pname = "mixxx";
          version = "development";

          src = pkgs.nix-gitignore.gitignoreSource ''
            /cbuild
            /.envrc
            /result
            /shell.nix
            /venv
          '' ./.;

          nativeBuildInputs = with pkgs; [
            cmake
            gdb
            git-clang-format
            clang-tools
            # for pre-commit installation since nixpkg.pre-commit may be to old
            python3
            python3Packages.virtualenv
            python3Packages.pip
            python3Packages.setuptools
            shell-configure
            shell-build
            shell-run
            shell-debug
          ];

          buildInputs = with pkgs; [
            qt5.wrapQtAppsHook
            qt5.qtx11extras
            microsoft-gsl

            libdjinterop
            libkeyfinder

            chromaprint
            fftw
            flac
            libid3tag
            libmad
            libopus
            libshout
            libsndfile
            libusb1
            libvorbis
            libebur128
            pkgconfig
            portaudio
            portmidi
            protobuf
            rubberband
            sqlite
            taglib
            soundtouch
            vamp.vampSDK
            opusfile
            upower
            hidapi
            git
            glib
            freetype
            fontconfig
            xorg.xorgproto
            xorg.libX11
            xorg.libXt
            xorg.libXft
            xorg.libXext
            xorg.libSM
            xorg.libICE
            libGLU
            lilv
            lame
            lv2
            makeWrapper
            qt5.qtbase
            pcre
            utillinux
            libselinux
            libsepol
            libsForQt5.qtkeychain
            ffmpeg
            libmodplug
            mp4v2
            wavpack
          ] ++ allLv2Plugins;

          postInstall = ''
            wrapProgram $out/bin/mixxx --prefix LV2_PATH : ${pkgs.lib.makeSearchPath "lib/lv2" allLv2Plugins}
          '';
        };

      in
      rec {
        checks = { };

        packages = {
          default = packages.mixxx;
          inherit mixxx libdjinterop;
        };

        apps = {
          default = apps.mixxx;
          inherit mixxx;
        };

        devShells.default = devShells.mixxx;
        devShells.mixxx = pkgs.mkShell {
          buildInputs = [
          ];

          nativeBuildInputs = [
            git-clang-format
          ];

          shellHook = ''
            export PYTHONPATH=venv/lib/python3.7/site-packages/:$PYTHONPATH
            export SOURCE_DATE_EPOCH=315532800
            echo -e "Mixxx development shell. Available commands:\n"
            echo " configure - configures cmake (only has to run once)"
            echo " build - compiles Mixxx"
            echo " run - runs Mixxx with development settings"
            echo " debug - runs Mixxx inside gdb"
          '';
        };
      }
    );
}