diff --git a/maintainers/scripts/find-tarballs.nix b/maintainers/scripts/find-tarballs.nix
index e989c0e2a9e..00659459660 100644
--- a/maintainers/scripts/find-tarballs.nix
+++ b/maintainers/scripts/find-tarballs.nix
@@ -18,7 +18,8 @@ let
 
   fetchurlDependencies =
     filter
-      (drv: drv.outputHash or "" != "" && drv.outputHashMode == "flat" && drv.postFetch or "" == "" && drv ? urls)
+      (drv: drv.outputHash or "" != "" && drv.outputHashMode or "flat" == "flat"
+          && drv.postFetch or "" == "" && drv ? urls)
       dependencies;
 
   dependencies = map (x: x.value) (genericClosure {