diff --git a/src/lib/Hydra/Controller/Jobset.pm b/src/lib/Hydra/Controller/Jobset.pm
index ef633201..1b9a82d8 100644
--- a/src/lib/Hydra/Controller/Jobset.pm
+++ b/src/lib/Hydra/Controller/Jobset.pm
@@ -361,7 +361,7 @@ sub getEvals {
         foreach my $input (@{$curInputs}) {
             my $p = $prevInputsHash{$input->name};
             push @changedInputs, $input
-                if !defined $p || $input->revision ne $p->revision || $input->type ne $p->type || $input->uri ne $p->uri || 
+                if !defined $p || ($input->revision || "") ne ($p->revision || "") || $input->type ne $p->type || ($input->uri || "") ne ($p->uri || "") || 
                    ( defined $input->dependency && defined $p->dependency && $input->dependency->id ne $p->dependency->id);
         }
         $prevInputs = $curInputs;
diff --git a/src/lib/Hydra/Controller/Root.pm b/src/lib/Hydra/Controller/Root.pm
index 79211fc4..b7c233e8 100644
--- a/src/lib/Hydra/Controller/Root.pm
+++ b/src/lib/Hydra/Controller/Root.pm
@@ -194,6 +194,13 @@ sub nar :Local :Args(1) {
     $c->stash->{storePath} = $path;
 }
 
+
+sub narinfo :Path('*.narinfo') {
+    my ($self, $c) = @_;
+    $c->stash->{current_view} = 'NixInfo';
+}
+
+
 sub change_password : Path('change-password') : Args(0) {
     my ($self, $c) = @_;
 
@@ -202,6 +209,7 @@ sub change_password : Path('change-password') : Args(0) {
     $c->stash->{template} = 'change-password.tt';
 }
 
+
 sub change_password_submit : Path('change-password/submit') : Args(0) {
     my ($self, $c) = @_;
 
@@ -219,6 +227,7 @@ sub change_password_submit : Path('change-password/submit') : Args(0) {
     $c->res->redirect("/");
 }
 
+
 sub logo :Local {
     my ($self, $c) = @_;
     my $path = $ENV{"HYDRA_LOGO"} or die("Logo not set!");