diff --git a/nix/nixos-modules/frontend/default.nix b/nix/nixos-modules/frontend/default.nix
index 88f24ef..d7fc1ea 100644
--- a/nix/nixos-modules/frontend/default.nix
+++ b/nix/nixos-modules/frontend/default.nix
@@ -35,6 +35,8 @@ in
       useXkbConfig = true;
     };
 
+    documentation.nixos.includeAllModules = true; # full manual aids NixOS dev
+
     environment = {
 
       pathsToLink = [
diff --git a/nix/nixos-modules/useable.nix b/nix/nixos-modules/useable.nix
index c46febf..f47e4eb 100644
--- a/nix/nixos-modules/useable.nix
+++ b/nix/nixos-modules/useable.nix
@@ -47,7 +47,7 @@ in
 
       nixos = {
         enable = lib.mkDefault true;
-        includeAllModules = lib.mkDefault true;
+        includeAllModules = lib.mkDefault false; # otherwise rebuilds full manual on each change of value
       };
 
     };