libghc-contravariant-dev software package provides Contravariant functors, you can install in your Ubuntu 17.04 (Zesty Zapus) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libghc-contravariant-dev
libghc-contravariant-dev is installed in your system.
Make ensure the libghc-contravariant-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-contravariant-dev *
You will get with libghc-contravariant-dev package name, version, architecture and description in a table
| Distro | Ubuntu 17 04 zesty zapus |
| Section | Haskell |
| Package | libghc-contravariant-dev |
| Version | 1.4-3 |
| Description | Contravariant functors |
| Sub Section | haskell |