libghc-cgi-dev software package provides Haskell CGI library for GHC, 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 libghc-cgi-dev
libghc-cgi-dev is installed in your system.
Make ensure the libghc-cgi-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-cgi-dev *
You will get with libghc-cgi-dev package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Haskell |
| Package | libghc-cgi-dev |
| Version | 3001.1.8.5-1+b2 [s390x], 3001. |
| Description | Haskell CGI library for GHC |
| Sub Section | Haskell |