diff --git a/src/Hydra/lib/Hydra/Controller/Root.pm b/src/Hydra/lib/Hydra/Controller/Root.pm
index cd903dd3..72673564 100644
--- a/src/Hydra/lib/Hydra/Controller/Root.pm
+++ b/src/Hydra/lib/Hydra/Controller/Root.pm
@@ -118,7 +118,7 @@ sub queue :Local {
 }
 
 
-sub showJobStatus :Local {
+sub showJobStatus {
     my ($c, $builds) = @_;
     $c->stash->{template} = 'jobstatus.tt';
 
@@ -683,20 +683,18 @@ sub download :Local {
 
 
 sub closure :Local {
-    my ($self, $c, $buildId, $productnr) = @_;
+    my ($self, $c, $buildId) = @_;
 
     my $build = getBuild($c, $buildId);
-    return error($c, "Build with ID $buildId doesn't exist.") if !defined $build;
+    return error($c, "Build $buildId doesn't exist.") if !defined $build;
 
-    my $product = $build->buildproducts->find({productnr => $productnr});
-    return error($c, "Build $buildId doesn't have a product $productnr.") if !defined $product;
+    return error($c, "Build $buildId cannot be downloaded as a closure.")
+        if !$build->buildproducts->find({type => "nix-build"});
 
-    return error($c, "Product is not a Nix build.") if $product->type ne "nix-build";
-
-    return error($c, "Path " . $product->path . " is no longer available.") unless isValidPath($product->path);
+    return error($c, "Path " . $build->outpath . " is no longer available.") unless isValidPath($build->outpath);
 
     $c->stash->{current_view} = 'Hydra::View::NixClosure';
-    $c->stash->{storePath} = $product->path;
+    $c->stash->{storePath} = $build->outpath;
     $c->stash->{name} = $build->nixname;
 
     # !!! quick hack; this is to make HEAD requests return the right
diff --git a/src/Hydra/root/product-list.tt b/src/Hydra/root/product-list.tt
index 89227424..f86ea0fe 100644
--- a/src/Hydra/root/product-list.tt
+++ b/src/Hydra/root/product-list.tt
@@ -9,7 +9,7 @@
       [% SWITCH product.type %]
 
       [% CASE "nix-build" %]
-        <a href="[% c.uri_for('/closure' build.id product.productnr) %]">
+        <a href="[% c.uri_for('/closure' build.id) %]">
           <img src="/static/images/nix-build.png" alt="Source" />
           Nix build of path <tt>[% product.path %]</tt>
         </a>
@@ -23,7 +23,7 @@
 
           or to download and unpack in one command:
 
-          <pre>$ curl [% c.uri_for('/closure' build.id product.productnr) %] | gunzip | nix-store --import</pre>
+          <pre>$ curl [% c.uri_for('/closure' build.id) %] | gunzip | nix-store --import</pre>
 
           <p>The package can then be found in the path <tt>[%
           product.path %]</tt>.  You’ll probably also want to do