I think it may be because the missing dependencies are not automatically installable.
The following packages have unmet dependencies:
leosac : Depends: libboost-regex1.55.0 but it is not installable
Depends: libboost-serialization1.55.0 but it is not installable
Depends: libboost-serialization1.49.0 but it is not installable
Depends: libtclap-dev but it is not installed
This is on a raspberry pi 3 with a brand new up to date raspbian installation.
The example install guide at https://leosac.github.io/leosac-doc/doc_output/develop/d5/d97/page_guide_rpi_piface_wiegand.html#install_guide in the debian section, the command "apt-get install -f;" removes leosac, (maybe an update to apr-get?) wheres the intended purpose is to install missing dependencies.
I think it may be because the missing dependencies are not automatically installable.
This is on a raspberry pi 3 with a brand new up to date raspbian installation.