(address . bug-guix@gnu.org)
/tmp/guix-build-kmessagelib-20.04.1.drv-0/messagelib-
20.04.1/messagecomposer/src/recipient/recipient.h:30
:10: fatal error: Libkdepim/MultiplyingLine: No such file or directory
30 | #include <Libkdepim/MultiplyingLine>
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~
Possibly the fix is as simple as adding kdepim to the inputs ...
Greetings,
Maxime.