libghc-unlambda-dev software package provides Unlambda interpreter library, 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 libghc-unlambda-dev
libghc-unlambda-dev is installed in your system.
Make ensure the libghc-unlambda-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-unlambda-dev *
You will get with libghc-unlambda-dev package name, version, architecture and description in a table
| Distro | Debian 7 wheezy |
| Section | Haskell |
| Package | libghc-unlambda-dev |
| Version | 0.1-2+b2 [amd64, armhf, i386, |
| Description | Unlambda interpreter library |
| Sub Section | Haskell |