let


  jobs = rec {


    tarball =
      { hydraSrc ? {outPath = ./.; rev = 1234;}
      , nixpkgs ? ../nixpkgs
      , officialRelease ? false
      }:

      with import nixpkgs {};

      releaseTools.makeSourceTarball {
        name = "hydra-tarball";
        version = "0.1";
        src = hydraSrc;
        inherit officialRelease;

        buildInputs = [zip unzip];

        jquery = fetchurl {
          url = http://jqueryui.com/download/jquery-ui-1.7.2.custom.zip;
          sha256 = "1l9dwaaqvdysmzlkg1vb8j0s0xn63d475gh53pjjwxw85668krdh";
        };

        tablesorter = fetchurl {
          url = http://tablesorter.com/jquery.tablesorter.zip;
          sha256 = "013zgglvifvy0yg0ybjrl823sswy9v1ihf5nmighmcyigfd6nrhb";
        };

        flot = fetchurl {
          url = http://flot.googlecode.com/files/flot-0.6.zip;
          sha256 = "1k2mfijvr1jwga65wcd78lp9ia17v99f1cfm5nlmc0k8glllbj5a";
        };

        # Since we don't have a `make dist', just tar everything.
        distPhase = ''
          ensureDir src/root/static/js/jquery
          unzip -d src/root/static/js/jquery $jquery
          rm -rf src/root/static/js/tablesorter
          unzip -d src/root/static/js $tablesorter
          unzip -d src/root/static/js $flot

          make -C src/sql
        
          releaseName=hydra-0.1$VERSION_SUFFIX;
          ensureDir $out/tarballs
          mkdir ../$releaseName
          cp -prd . ../$releaseName
          cd ..
          tar cfj $out/tarballs/$releaseName.tar.bz2 $releaseName
          tar cfz $out/tarballs/$releaseName.tar.gz $releaseName
          zip -9r $out/tarballs/$releaseName.zip $releaseName
        '';
      };


    build = 
      { tarball ? jobs.tarball {}
      , nixpkgs ? ../nixpkgs
      , system ? "x86_64-linux"
      }:

      let pkgs = import nixpkgs {inherit system;}; in
      
      with pkgs;

      let nix = nixSqlite; in

      stdenv.mkDerivation {
        name = "hydra" + (if tarball ? version then "-" + tarball.version else "");

        buildInputs =
          [ perl makeWrapper libtool ]
          ++ (import ./deps.nix) { inherit pkgs; };

        preUnpack = ''
          src=$(ls ${tarball}/tarballs/*.tar.bz2)
        ''; # */

        hydraPath = stdenv.lib.concatStringsSep ":" (map (p: "${p}/bin") ( [
          libxslt sqlite subversion openssh nix coreutils findutils
          gzip bzip2 lzma gnutar unzip git
          gnused graphviz
        ] ++ ( if stdenv.isLinux then [rpm dpkg cdrkit] else [] )));

        installPhase = ''
          ensureDir $out/nix-support
          
          ensureDir $out/libexec
          cp -prd src $out/libexec/hydra

          mv $out/libexec/hydra/script $out/bin

          cp ${"${nixpkgs}/pkgs/build-support/fetchsvn/nix-prefetch-svn"} $out/bin/nix-prefetch-svn
          cp ${"${nixpkgs}/pkgs/build-support/fetchgit/nix-prefetch-git"} $out/bin/nix-prefetch-git

          make -C src/c NIX=${nix} ATERM=${aterm}
          cp src/c/hydra_eval_jobs $out/bin

          for i in $out/bin/*; do
              wrapProgram $i \
                  --prefix PERL5LIB ':' $out/libexec/hydra/lib:$PERL5LIB \
                  --prefix PATH ':' $out/bin:$hydraPath \
                  --set HYDRA_HOME $out/libexec/hydra \
                  --set HYDRA_RELEASE ${tarball.version} \
                  --set NIX_RELEASE ${nix.name}
          done

          ensureDir $out/share/doc/hydra/manual
          cp doc/manual/* $out/share/doc/hydra/manual/
          ln -s manual.html $out/share/doc/hydra/manual/index.html
          echo "doc manual $out/share/doc/hydra/manual" >> $out/nix-support/hydra-build-products
          echo "nix-build none $out" >> $out/nix-support/hydra-build-products
        ''; # */

        meta = {
          description = "Build of Hydra on ${system}";
        };
      };

  };


in jobs