diff --git a/doc/manual/default.nix b/doc/manual/default.nix
index c46e89d0fa14..4f1e555583d2 100644
--- a/doc/manual/default.nix
+++ b/doc/manual/default.nix
@@ -41,7 +41,7 @@ let
         ./manual.xml
       cp ${./style.css} $out/style.css
       ensureDir $out/nix-support
-      echo "doc manual $out" >> $out/nix-support/hydra-build-products
+      echo "doc manual $out manual.html" >> $out/nix-support/hydra-build-products
     '';
   };