{
  description = "Additional packages for ARTIQ";

  inputs.artiq.url = git+https://github.com/m-labs/artiq.git;

  outputs = { self, artiq }:
    let
      pkgs = import artiq.inputs.nixpkgs { system = "x86_64-linux"; };

      condaDeps = with pkgs; [ zlib xorg.libSM xorg.libICE xorg.libX11 xorg.libXau xorg.libXi xorg.libXrender libselinux libGL ];
      # Use the full Anaconda distribution, which already contains conda-build and its many dependencies.
      condaInstaller = pkgs.fetchurl {
        url = "https://repo.anaconda.com/archive/Anaconda3-2021.11-Linux-x86_64.sh";
        sha256 = "sha256-/t+eNAA5VX97XoqKhq/6nSmfXpggFEvXuSrp9+4IrGA=";
      };
      condaInstallerEnv = pkgs.buildFHSUserEnv {
        name = "conda-installer-env";
        targetPkgs = pkgs: condaDeps;
      };
      condaInstalled = pkgs.stdenvNoCC.mkDerivation {
        name = "conda-installed";
        src = condaInstaller;
        buildInputs = [ condaInstallerEnv ];
        phases = [ "buildPhase" "installPhase" ];
        buildPhase =
          ''
          cp $src conda-installer.sh
          chmod +x conda-installer.sh
          # keep the same file length to avoid breaking embedded payload offsets
          sed -i 0,/unset\ LD_LIBRARY_PATH/s//\#nset\ LD_LIBRARY_PATH/ conda-installer.sh
          '';
        installPhase =
          ''
          conda-installer-env -c "./conda-installer.sh -p $out -b"
          substituteInPlace $out/lib/python3.9/site-packages/conda/gateways/disk/__init__.py \
            --replace "os.chmod(path, 0o2775)" "pass"
          '';
      };
      condaBuilderEnv = pkgs.buildFHSUserEnv {
        name = "conda-builder-env";
        targetPkgs = pkgs: condaDeps ++ [ condaInstalled ];
      };
      makeCondaRecipe = (constituent:
        ''
        # conda build breaks if write permissions aren't set on source files.
        cp --no-preserve=mode,ownership -R ${constituent.src} workaround-conda
        cd workaround-conda
        tar cf ../${constituent.name}.tar .
        cd ..
        rm -rf workaround-conda

        mkdir -p conda/${constituent.name}

        cat << EOF > conda/${constituent.name}/meta.yaml
        package:
          name: ${constituent.name}
          version: ${constituent.version}

        source:
          url: ../../${constituent.name}.tar

        {% set data = load_setup_py_data() %}

        build:
          noarch: python
          entry_points:
            # NOTE: conda-build cannot distinguish between console and gui scripts
            {% for entry_point_type, entry_points in data.get("entry_points", dict()).items() -%}
            {% for entry_point in entry_points -%}
            - {{ entry_point }}
            {% endfor %}
            {% endfor %}
          ignore_prefix_files: True

        requirements:
          run:
        ${pkgs.lib.concatStringsSep "\n" (map (s: "    - ${s}") constituent.dependencies)}
        EOF

        cat << EOF > conda/${constituent.name}/build.sh
        #!/bin/bash
        set -e
        ${constituent.preSetup or ""}
        python setup.py install \
          --prefix=\$PREFIX \
          --single-version-externally-managed \
          --record=record.txt \
          --no-compile
        EOF
        chmod 755 conda/${constituent.name}/build.sh
        ''
      );
      makeCondaChannel = constituents: pkgs.stdenvNoCC.mkDerivation {
        name = "conda-channel";
        buildInputs = [ condaBuilderEnv ];
        phases = [ "buildPhase" "installPhase" ];
        buildPhase = pkgs.lib.concatStringsSep "\n" (map makeCondaRecipe constituents);
        installPhase =
          ''
          HOME=`pwd`
          mkdir $out
          conda-builder-env -c "
            ${pkgs.lib.concatStringsSep "\n"
              (map (constituent: "conda build --no-anaconda-upload --no-test --output-folder $out conda/${constituent.name}") constituents)}
          "

          mkdir $out/nix-support
          for package in $out/*/*.tar.bz2; do
            echo file conda $package >> $out/nix-support/hydra-build-products
          done
          '';
      };
      
    in rec {
      inherit makeCondaChannel;
      packages.x86_64-linux = rec {
        korad_ka3005p = pkgs.python3Packages.buildPythonPackage {
          pname = "korad_ka3005p";
          version = "1.1";
          src = pkgs.fetchFromGitHub {
            owner = "m-labs";
            repo = "korad_ka3005p";
            rev = "a1898409cb188b388ed1cf84e76ca69e9c8a74eb";
            sha256 = "0h20qss70nssqiagc2fx75mravq1pji7rizhag3nq8xrcz2w20nc";
          };
          propagatedBuildInputs = [ artiq.inputs.sipyco.packages.x86_64-linux.sipyco artiq.packages.x86_64-linux.asyncserial ];
        };
        novatech409b = pkgs.python3Packages.buildPythonPackage {
          pname = "novatech409b";
          version = "1.1";
          src = pkgs.fetchFromGitHub {
            owner = "m-labs";
            repo = "novatech409b";
            rev = "3bd559753972f07d881df66b7c6819afc5436053";
            sha256 = "1g9qv6fn5h7d393mb1v7w8sg6fimqg34blqdj22qnayb4agw1wyg";
          };
          propagatedBuildInputs = [ artiq.inputs.sipyco.packages.x86_64-linux.sipyco artiq.packages.x86_64-linux.asyncserial ];
        };
        lda = pkgs.python3Packages.buildPythonPackage {
          name = "lda";
          version = "1.1";
          src = pkgs.fetchFromGitHub {
            owner = "m-labs";
            repo = "lda";
            rev = "e6bf828b6dfd7fbf59b61b691712736c98c95970";
            sha256 = "1w4ykzsl3386bz4ggpd6i60b6a3k7rnc6qjw59xm3hk0vs3w2vyn";
          };
          propagatedBuildInputs = [ artiq.inputs.sipyco.packages.x86_64-linux.sipyco ];
          postPatch = ''
            substituteInPlace lda/hidapi.py \
            --replace "hidapi_lib_path = None"\
                      "hidapi_lib_path = '${pkgs.hidapi}/lib/libhidapi-libusb.so.0'"
          '';
        };
        thorlabs_tcube = pkgs.python3Packages.buildPythonPackage {
          pname = "thorlabs_tcube";
          version = "1.1";
          src = pkgs.fetchFromGitHub {
            owner = "m-labs";
            repo = "thorlabs_tcube";
            rev = "0cb0c15fc7e660a150e193245f5338d48f8b97db";
            sha256 = "1n4zmjcj2kpd97217y602pq6x8s80w39fgyi6qjmal92aicqdg07";
          };
          propagatedBuildInputs = [ artiq.inputs.sipyco.packages.x86_64-linux.sipyco artiq.packages.x86_64-linux.asyncserial ];
        };
        newfocus8742 = pkgs.python3Packages.buildPythonPackage {
          pname = "newfocus8742";
          version = "0.2";
          src = pkgs.fetchFromGitHub {
            owner = "quartiq";
            repo = "newfocus8742";
            rev = "9f6092b724b33b934aa4d3a1d6a20c295cd1d02d";
            sha256 = "0qf05ghylnqf3l5vjx5dc748wi84xn6p6lb6f9r8p6f1z7z67fb8";
          };
          propagatedBuildInputs = [ artiq.inputs.sipyco.packages.x86_64-linux.sipyco pkgs.python3Packages.pyusb ];
          # no unit tests so do a simple smoke test
          checkPhase = "python -m newfocus8742.aqctl_newfocus8742 -h";
        };
        hut2 = pkgs.python3Packages.buildPythonPackage {
          pname = "hut2";
          version = "0.2";
          src = pkgs.fetchFromGitHub {
            owner = "quartiq";
            repo = "hut2";
            rev = "68369d5d63d233827840a9a752d90454a4e03baa";
            sha256 = "0r832c0icz8v3w27ci13024bqfslj1gx6dwhjv11ksw229xdcghd";
          };
          propagatedBuildInputs = [ artiq.inputs.sipyco.packages.x86_64-linux.sipyco ];
          # no unit tests without hardware so do a simple smoke test
          checkPhase = "python -m hut2.aqctl_hut2 -h";
        };
        wand = pkgs.python3Packages.buildPythonPackage {
          pname = "wand";
          version = "0.4.dev";
          src = pkgs.fetchFromGitHub {
            owner = "OxfordIonTrapGroup";
            repo = "wand";
            rev = "c080ddab6b2d94bb673ed32a0cea2bf68e66c702";
            sha256 = "sha256-T27/mZepPrnheoVEKsP5cRDFc1JffTnuPvXq2r2GP4E=";
          };
          nativeBuildInputs = [ pkgs.qt5.wrapQtAppsHook ];
          dontWrapQtApps = true;
          postFixup = ''
            wrapQtApp "$out/bin/wand_gui"
          '';
          propagatedBuildInputs = [ artiq.packages.x86_64-linux.artiq artiq.packages.x86_64-linux.qasync ]
            ++ [ artiq.inputs.sipyco.packages.x86_64-linux.sipyco ]
            ++ (with pkgs.python3Packages; [ numpy scipy influxdb pyqtgraph setuptools ]);
        };
        flake8-artiq = pkgs.python3Packages.buildPythonPackage {
          pname = "flake8-artiq";
          version = "0.1.0";
          src = pkgs.fetchgit {
            url = "https://gitlab.com/duke-artiq/flake8-artiq.git";
            rev = "1216092974140a561850905734fc22fdacdc2cde";
            sha256 = "0rkab2qdwyzms6nxc44jzb5grvkkbpjwwmfv2zj96cm6cm8d9pdr";
          };
          propagatedBuildInputs = [ pkgs.python3Packages.flake8 ];
          checkInputs = [ pkgs.python3Packages.pytestCheckHook ];
        };
        dax = pkgs.python3Packages.buildPythonPackage rec {
          pname = "dax";
          version = "6.7";
          src = pkgs.fetchgit {
            url = "https://gitlab.com/duke-artiq/dax.git";
            rev = "v${version}";
            sha256 = "0rgvqqiypqvxjzrsixn3h7dn93isqw5vc2wrmpkxhzvw9lh5ihm7";
          };
          VERSIONEER_OVERRIDE = version;
          inherit (pkgs.python3Packages.pygit2) SSL_CERT_FILE;
          doCheck = false; # tests only pass for the latest stable ARTIQ version
          propagatedBuildInputs = [ artiq.packages.x86_64-linux.artiq artiq.inputs.sipyco.packages.x86_64-linux.sipyco ]
            ++ (with pkgs.python3Packages; [ numpy scipy pyvcd natsort pygit2 matplotlib graphviz h5py networkx sortedcontainers ]);
          checkInputs = [ pkgs.python3Packages.pytestCheckHook ];
        };
        dax-applets = pkgs.python3Packages.buildPythonPackage rec {
          pname = "dax-applets";
          version = "0.0.0";
          src = pkgs.fetchgit {
            url = "https://gitlab.com/duke-artiq/dax-applets.git";
            rev = "0f0196b6941b0c44a33c85d8c02047ca65466463";
            sha256 = "0mx6yjvprhdnkdigwns8mg6v5daqxpgbv7mf63fa76i1iv2wvak4";
          };
          propagatedBuildInputs = [ artiq.packages.x86_64-linux.artiq ]
            ++ (with pkgs.python3Packages; [ numpy pyqt5 pyqtgraph ]);
          doCheck = false;
        };
        conda-channel = makeCondaChannel [
          {
            name = "sipyco";
            version = artiq.inputs.sipyco.packages.x86_64-linux.sipyco.version;
            src = artiq.inputs.sipyco.packages.x86_64-linux.sipyco.src;
            dependencies = [ "numpy" "pybase64" ];
          }
          {
            name = "pythonparser";
            version = artiq.packages.x86_64-linux.pythonparser.version;
            src = artiq.packages.x86_64-linux.pythonparser.src;
            dependencies = [ "regex" ];
          }
          {
            name = "artiq-comtools";
            version = artiq.inputs.artiq-comtools.packages.x86_64-linux.artiq-comtools.version;
            src = artiq.inputs.artiq-comtools.packages.x86_64-linux.artiq-comtools.src;
            dependencies = [ "numpy" "aiohttp" "sipyco" ];
          }
          {
            name = "artiq";
            version = artiq.packages.x86_64-linux.artiq.version;
            src = artiq.packages.x86_64-linux.artiq.src;
            preSetup =
              ''
              export VERSIONEER_OVERRIDE=${artiq.packages.x86_64-linux.artiq.version}
              export VERSIONEER_REV=${artiq.sourceInfo.rev}
              '';
            dependencies = [
              "pythonparser"
              "scipy"
              "numpy"
              "prettytable"
              "h5py"
              "python-dateutil"
              "pyqt"
              "qasync"
              "pyqtgraph"
              "pygit2"
              "python-levenshtein"
              "sipyco"
              "llvmlite"
              "llvm-tools"
              "lld"
              "tqdm"
              "artiq-comtools"
            ];
          }

          {
            name = "korad_ka3005p";
            version = korad_ka3005p.version;
            src = korad_ka3005p.src;
            dependencies = [ "sipyco" "asyncserial" ];
          }
          {
            name = "novatech409b";
            version = novatech409b.version;
            src = novatech409b.src;
            dependencies = [ "sipyco" "asyncserial" ];
          }
          {
            name = "lda";
            version = lda.version;
            src = lda.src;
            dependencies = [ "sipyco" ];
          }
          {
            name = "thorlabs_tcube";
            version = thorlabs_tcube.version;
            src = thorlabs_tcube.src;
            dependencies = [ "sipyco" "asyncserial" ];
          }
          {
            name = "newfocus8742";
            version = newfocus8742.version;
            src = newfocus8742.src;
            dependencies = [ "sipyco" ];
          }
          {
            name = "hut2";
            version = hut2.version;
            src = hut2.src;
            dependencies = [ "sipyco" ];
          }
          {
            name = "wand";
            version = wand.version;
            src = wand.src;
            dependencies = [ "artiq" "qasync" "numpy" "scipy" "influxdb" ];
          }
          {
            name = "flake8-artiq";
            version = flake8-artiq.version;
            src = flake8-artiq.src;
            dependencies = [ "flake8" ];
          }
          {
            name = "dax";
            version = dax.version;
            src = dax.src;
            dependencies = [ "python>=3.7" "artiq" "sipyco" "numpy" "scipy" "pyvcd" "natsort" "pygit2" "matplotlib" "python-graphviz" "h5py" "networkx" "sortedcontainers" ];
          }
          {
            name = "dax-applets";
            version = dax-applets.version;
            src = dax-applets.src;
            dependencies = [ "python>=3.5" "artiq" "numpy" "pyqt" "pyqtgraph" ];
          }
        ];
      };

      hydraJobs = packages.x86_64-linux;
    };
}