diff --git a/src/lib/Hydra/Helper/AddBuilds.pm b/src/lib/Hydra/Helper/AddBuilds.pm
index 52b0b030..0d58e83b 100644
--- a/src/lib/Hydra/Helper/AddBuilds.pm
+++ b/src/lib/Hydra/Helper/AddBuilds.pm
@@ -271,6 +271,8 @@ sub buildInputToString {
             ")";
     } else {
         $result = "{ outPath = builtins.storePath " . $input->{storePath} . "" .
+            "; type = \"" . $input->{type} . "\"" .
+            (defined $input->{uri} ? "; uri = \"" . $input->{uri} . "\"" : "") .
             (defined $input->{revNumber} ? "; rev = " . $input->{revNumber} . "" : "") .
             (defined $input->{revision} ? "; rev = \"" . $input->{revision} . "\"" : "") .
             (defined $input->{revCount} ? "; revCount = " . $input->{revCount} . "" : "") .