}
sub pkg : Chained('nix') PathPart Args(1) {
    my ($self, $c, $pkgName) = @_;
    my $pkg = $c->stash->{nixPkgs}->{$pkgName};
    notFound($c, "Unknown Nix package `$pkgName'.")
        unless defined $pkg;
    $c->stash->{build} = $pkg;
    $c->stash->{current_view} = 'Hydra::View::NixPkg';
    $c->response->content_type('application/nix-package');

    my $pkgName = $build->nixname . "-" . $build->system . ".nixpkg";
    $c->stash->{nixPkgs} = {$pkgName => $build};

}
sub nixpkg :Local {
    my ($self, $c, $buildId) = @_;
    my $build = getBuild($c, $buildId);
    notFound($c, "Build $buildId doesn't exist.") if !defined $build;
    error($c, "Build $buildId cannot be downloaded as a Nix package.")
        if !$build->buildproducts->find({type => "nix-build"});
    error($c, "Path " . $build->outpath . " is no longer available.") unless isValidPath($build->outpath);
    $c->stash->{current_view} = 'Hydra::View::NixPkg';
    $c->stash->{build} = $build;
    $c->response->content_type('application/nix-package');

        [% uri = c.uri_for('/nixpkg' build.id) %]

        [% uri = c.uri_for('/build' build.id 'nix' 'pkg' "${build.nixname}-${build.system}.nixpkg") %]