Comment 2 for bug 275457

ISTM, that to feature freeze "brokenness" is worse than to make an exception to at least try to fix something.

In any case, here's the results of your package:

$ sudo dpkg -i evolution-jescs_2.24.0-0ubuntu1_i386.deb dpkg: regarding evolution-jescs_2.24.0-0ubuntu1_i386.deb containing evolution-jescs:
 evolution-jescs conflicts with evolution (>= 2.23.0)
  evolution (version 2.24.0-0ubuntu1) is present and installed.
dpkg: error processing evolution-jescs_2.24.0-0ubuntu1_i386.deb (--install):
 conflicting packages - not installing evolution-jescs
Errors were encountered while processing:
 evolution-jescs_2.24.0-0ubuntu1_i386.deb
brian@pc:~/tmp$ sudo dpkg -r evolution-jescs
dpkg - warning: ignoring request to remove evolution-jescs which isn't installed.