diff --git a/nixos/tests/installer.nix b/nixos/tests/installer.nix
index 64920581721..75918fc36c7 100644
--- a/nixos/tests/installer.nix
+++ b/nixos/tests/installer.nix
@@ -340,9 +340,6 @@ let
             desktop-file-utils
             docbook5
             docbook_xsl_ns
-            (docbook-xsl-ns.override {
-              withManOptDedupPatch = true;
-            })
             kbd.dev
             kmod.dev
             libarchive.dev