diff --git a/pkgs/top-level/all-packages.nix b/pkgs/top-level/all-packages.nix
index ce4db54bbc2d..11ea168cd912 100644
--- a/pkgs/top-level/all-packages.nix
+++ b/pkgs/top-level/all-packages.nix
@@ -15478,7 +15478,9 @@ with pkgs;
     spice_gtk = spice_gtk;
   };
 
-  virt-top = callPackage ../applications/virtualization/virt-top { };
+  virt-top = callPackage ../applications/virtualization/virt-top {
+    ocamlPackages = ocamlPackages_4_01_0;
+  };
 
   virtmanager = callPackage ../applications/virtualization/virt-manager {
     vte = gnome3.vte;