libdpkg-ruby1.9.1 software package provides virtual package provided by ruby-debian, you can install in your Debian 8 (Jessie) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libdpkg-ruby1.9.1
libdpkg-ruby1.9.1 is installed in your system.
Make ensure the libdpkg-ruby1.9.1 package were installed using the commands given below,
$ sudo dpkg-query -l | grep libdpkg-ruby1.9.1*
You will get with libdpkg-ruby1.9.1 package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Virtual packages |
| Package | libdpkg-ruby1.9.1 |
| Version | |
| Description | virtual package provided by ruby-debian |
| Sub Section | virtual |