You can with Helios packages without explicitly loading helios/index.html.

Both in legacy IDE and in Helios popup.

internal/index.html

@@ -17,7 +17,7 @@
         }
     });
     require(
-        ["amber/devel", "amber_cli/AmberCli"],
+        ["amber/devel", "helios/all", "amber_cli/AmberCli"],
         function (smalltalk) {
             smalltalk.initialize({'transport.defaultAmdNamespace': "amber_core"});
         }