Install diodon-dev by entering the following commands in the terminal:
sudo apt update sudo apt install diodon-dev
GTK+ Clipboard manager (development files)
Diodon is a lightweight clipboard manager for Linux written in Vala which "aims to be the best integrated clipboard manager for the Gnome/Unity desktop". . Diodon features include Ubuntu indicator, clipboard sync (primary selection and Ctrl+C / Ctrl+V clipboard) and a zeitgeist integration for an infinite clipboard history. . Diodon is also extensible through its plugin system. . This package is required to build plugins for Diodon.