Dear Maintainer,
While installing this package on bullseye (emacs 1:27.1+1-3.1),
I met the following error (though the functionaliy seems fine).
Performing actions...
Selecting previously unselected package emacs-calfw.
(Reading database ... 325957 files and directories currently installed.)
Preparing to unpack .../emacs-calfw_1.6+git20180118-1.1_all.deb ...
Unpacking emacs-calfw (1.6+git20180118-1.1) ...
Setting up emacs-calfw (1.6+git20180118-1.1) ...
ERROR: emacs-calfw is broken - called emacs-package-install as a new-style add-on, but has no compat file.
Install emacs-calfw for emacs
Install emacs-calfw for emacs