Horribly misleading error message: kernel [source vs. headers] not installed

In dkms=2.0.20.4-0ubuntu2, /etc/init.d/dkms_autoinstaller, line 141, it says

   echo " Kernel source for $kernel not installed. Cannot install this module." >>$output_loc

This is run if /lib/modules/$kernel/build/include doesn't exist (and another condition is true), but /lib/modules/$kernel/build/include is created by linux-**headers**-$kernel, not linux-**sources**-$kernel.

The error message should make this clear. It's good usability to suggest remedies for error situation, so I suggest

   echo " Package linux-headers-$kernel not installed. Cannot install this module." >>$output_loc

--Or--

   echo " Kernel source/headers for $kernel not installed. Cannot install this module." >>$output_loc
   echo " Try installing the headers (apt-get install linux-headers-$kernel)."

--Or--

something to that effect.