if(LSB_RELEASE_EXEC AND DPKG_BUILDPACKAGE)

  execute_process(COMMAND env LC_ALL=C date "+%a, %-d %b %Y %H:%M:%S %z" OUTPUT_VARIABLE DEB_DATE OUTPUT_STRIP_TRAILING_WHITESPACE)
  execute_process(COMMAND /bin/sh "-c" "${LSB_RELEASE_EXEC} -cs" OUTPUT_VARIABLE DEB_CODENAME OUTPUT_STRIP_TRAILING_WHITESPACE)

  if(DEB_CODENAME AND DEB_DATE)
    configure_file(${CMAKE_CURRENT_SOURCE_DIR}/changelog.in ${CMAKE_CURRENT_SOURCE_DIR}/changelog)
  endif()

endif()