diff --git a/modules/nix-tools/user.nix b/modules/nix-tools/user.nix
index 06e88ba..a72c621 100644
--- a/modules/nix-tools/user.nix
+++ b/modules/nix-tools/user.nix
@@ -38,6 +38,14 @@
       security.sudo-rs.enable = lib.mkIf isAdmin true;
 
       home-manager.useGlobalPkgs = true;
+      # DetNix warns when HM generates options.json for manuals; disable manual outputs.
+      home-manager.sharedModules = [
+        {
+          manual.manpages.enable = false;
+          manual.html.enable = false;
+          manual.json.enable = false;
+        }
+      ];
       # https://github.com/Doc-Steve/dendritic-design-with-flake-parts/wiki/Dendritic_Aspects#multi-context-aspect
       home-manager.users."${username}" = {
         imports = [ self.modules.homeManager."${username}" ];