- Use "Architecture: any" in "control" to get architecture
   "amd64" or "i386" in package names
 - Test if BYTE_CODE_ONLY is empty or not as condition,
   not a specific value in "rules"
 - Use a separate variable "BYTE_CODE_ONLY_OPT" in "rules"
   that conditionally is set to "--byte-code-only" if
   BYTE_CODE_ONLY is set in the environment