ganeti-haskell-2.12 software package provides cluster virtualization manager - Haskell components, 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 ganeti-haskell-2.12
ganeti-haskell-2.12 is installed in your system.
Make ensure the ganeti-haskell-2.12 package were installed using the commands given below,
$ sudo dpkg-query -l | grep ganeti-haskell-2.12 *
You will get with ganeti-haskell-2.12 package name, version, architecture and description in a table
| Distro | Debian 9 stretch |
| Section | Administration Utilities |
| Package | ganeti-haskell-2.12 |
| Version | 2.12.4-1+deb8u3 |
| Description | cluster virtualization manager - Haskell components |
| Sub Section | admin |