packages-config: don't export minimal-bootstrap packages

Fixes https://github.com/NixOS/nixpkgs/issues/244966

pkgs/top-level/packages-config.nix

@@ -45,5 +45,11 @@
     haskell = super.haskell // {
       compiler = recurseIntoAttrs super.haskell.compiler;
     };
+
+    # minimal-bootstrap packages aren't used for anything but bootstrapping our
+    # stdenv. They should not be used for any other purpose and therefore not
+    # show up in search results or repository tracking services that consume our
+    # packages.json https://github.com/NixOS/nixpkgs/issues/244966
+    minimal-bootstrap = { };
   };
 }