0install-core software package provides cross-distribution packaging system (non-GUI parts), 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 0install-core
0install-core is installed in your system.
Make ensure the 0install-core package were installed using the commands given below,
$ sudo dpkg-query -l | grep 0install-core *
You will get with 0install-core package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Administration Utilities |
| Package | 0install-core |
| Version | 2.7-3 |
| Description | cross-distribution packaging system (non-GUI parts) |
| Sub Section | admin |