diff --git a/tests/installer.nix b/tests/installer.nix
index 88ad79ae0ee..2e8f3f62b07 100644
--- a/tests/installer.nix
+++ b/tests/installer.nix
@@ -24,6 +24,7 @@ let
                 pkgs.docbook5
                 pkgs.docbook5_xsl
                 pkgs.grub
+                pkgs.perlPackages.XMLLibXML
               ];
           }
         ];