nixpkgs-bootstrap: fix so the scope is recursed into and my updaters know to update it

pkgs/by-name/nixpkgs-bootstrap/package.nix

@@ -0,0 +1,12 @@
+# this scope isn't special in any way, except that `packagesFromDirectory` doesn't set `recurseIntoAttrs`, and this does.
+# (that's needed for my update scripts to be found)
+{
+  lib,
+  newScope,
+}:
+lib.recurseIntoAttrs (lib.makeScope newScope (self: with self; {
+  mkNixpkgs = callPackage ./mkNixpkgs.nix { };
+  master = callPackage ./master.nix { };
+  staging = callPackage ./staging.nix { };
+  staging-next = callPackage ./staging-next.nix { };
+}))