How to build?

[K0-RR]

[nacia@nacia telepathy-morse]$ ls
CMakeLists.txt  connection.hpp     dbus-service.in  info.hpp       rpm
COPYING         contactgroups.cpp  debug.cpp        main.cpp       telepathy-morse.pro
ChangeLog       contactgroups.hpp  debug.hpp        morse.manager  textchannel.cpp
README.md       datastorage.cpp    imports          protocol.cpp   textchannel.hpp
connection.cpp  datastorage.hpp    info.cpp         protocol.hpp   version.cpp.in
[nacia@nacia telepathy-morse]$ cmake --build .
Error: could not load cache