message: Add a command line parameter to tell CE that it's being called from VCPKG.EXE
  (or something else would be ok -- just add a double-dash style switch at the end of the whole command `--whatever`)
diff: @@ -63,6 +63,8 @@ namespace vcpkg
  cmd_run.string_arg("--accept-eula");
  cmd_run.string_arg(arg0);
  cmd_run.forwarded_args(args);
  + // tell vcpkg-ce that it's being called from vcpkg
  + cmd_run.string_arg("--from-vcpkg");
  return cmd_execute(cmd_run, InWorkingDirectory{paths.original_cwd});
  }
  }
  