Note: I am on Kubuntu 17.10 with Backports PPA enabled.
While trying to get my build environment setup for KDE, I was instructed to install "sudo apt install libkf5.*-dev". The search returned two conflicting packages, libkf5coreaddons-dev-bin, and libkf5coreaddons-bin-dev. Bin-dev is older.
The following packages have unmet dependencies: libkf5coreaddons-dev-bin : Breaks: libkf5coreaddons-bin-dev Breaks: libkf5coreaddons-bin-dev:i386
Omitting libk5fcoreaddons-bin-dev from the install list provided a successful install of the necessary dependencies.