libghc-web-routes-happstack-de software package provides web-routes support for Happstack, 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-web-routes-happstack-de
libghc-web-routes-happstack-de is installed in your system.
Make ensure the libghc-web-routes-happstack-de package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-web-routes-happstack-de*
You will get with libghc-web-routes-happstack-de package name, version, architecture and description in a table
| Distro | Debian 8 jessie |
| Section | Haskell |
| Package | libghc-web-routes-happstack-de |
| Version | 0.23.7-1+b7 [s390x], 0.23.7-1+ |
| Description | web-routes support for Happstack |
| Sub Section | Haskell |