diff --git a/doc/manual/book.toml b/doc/manual/book.toml
index d524dbb13..73fb7e75e 100644
--- a/doc/manual/book.toml
+++ b/doc/manual/book.toml
@@ -6,8 +6,6 @@ additional-css = ["custom.css"]
 additional-js = ["redirects.js"]
 edit-url-template = "https://github.com/NixOS/nix/tree/master/doc/manual/{path}"
 git-repository-url = "https://github.com/NixOS/nix"
-fold.enable = true
-fold.level = 1
 
 [preprocessor.anchors]
 renderers = ["html"]