my $res = "[\n";

    my %perSystem;

        $res .= "  # $pkg->{name}\n";
        $res .= "  { type = \"derivation\";\n";
        $res .= "    name = " . escape ($build->get_column("releasename") or $build->nixname) . ";\n";
        $res .= "    system = " . (escape $build->system) . ";\n";
        $res .= "    outPath = " . (escape $pkg->{outPath}) . ";\n";
        $res .= "    meta = {\n";
        $res .= "      description = " . (escape $build->description) . ";\n"

        my $s = "";
        $s .= "  # $pkg->{name}\n";
        $s .= "  ${\escape $build->get_column('job')} = {\n";
        $s .= "    type = \"derivation\";\n";
        $s .= "    name = ${\escape ($build->get_column('releasename') or $build->nixname)};\n";
        $s .= "    system = ${\escape $build->system};\n";
        $s .= "    outPath = ${\escape $pkg->{outPath}};\n";
        $s .= "    meta = {\n";
        $s .= "      description = ${\escape $build->description};\n"

        $res .= "      longDescription = " . (escape $build->longdescription) . ";\n"

        $s .= "      longDescription = ${\escape $build->longdescription};\n"

        $res .= "      license = " . (escape $build->license) . ";\n"

        $s .= "      license = ${\escape $build->license};\n"

        $res .= "    };\n";
        $res .= "  }\n";

        $s .= "      maintainers = ${\escape $build->maintainers};\n"
            if $build->maintainers;
        $s .= "    };\n";
        $s .= "  };\n\n";
        $perSystem{$build->system} .= $s;
    }
    my $res = "{ system ? builtins.currentSystem }:\n\n";
    my $first = 1;
    foreach my $system (keys %perSystem) {
        $res .= "else " if !$first;
        $res .= "if system == ${\escape $system} then {\n\n";
        $res .= $perSystem{$system};
        $res .= "}\n\n";
        $first = 0;

    $res .= "]\n";

    $res .= "else " if !$first;
    $res .= "{}\n";

    $tar->add_data("channel/channel-name", ($c->stash->{channelName} or "unnamed-channel"), {mtime => 0});
    $tar->add_data("channel/default.nix", $res, {mtime => 0});

    $tar->add_data("channel/channel-name", ($c->stash->{channelName} or "unnamed-channel"), {mtime => 1});
    $tar->add_data("channel/default.nix", $res, {mtime => 1});