libffi-ruby software package provides Transitional package for ruby-ffi, you can install in your Debian 7 (Wheezy) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libffi-ruby
libffi-ruby is installed in your system.
Make ensure the libffi-ruby package were installed using the commands given below,
$ sudo dpkg-query -l | grep libffi-ruby *
You will get with libffi-ruby package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Old Libraries |
| Package | libffi-ruby |
| Version | 1.0.11debian-5 |
| Description | Transitional package for ruby-ffi |
| Sub Section | oldlibs |