budgie-core software package provides Core package for Budgie-Desktop, you can install in your Debian 9 (Stretch) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install budgie-core
budgie-core is installed in your system.
Make ensure the budgie-core package were installed using the commands given below,
$ sudo dpkg-query -l | grep budgie-core *
You will get with budgie-core package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | X Window System software |
| Package | budgie-core |
| Version | 10.2.8-1 |
| Description | Core package for Budgie-Desktop |
| Sub Section | x11 |