libghc-entropy-dev software package provides cryptographically-strong entropy, 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-entropy-dev
libghc-entropy-dev is installed in your system.
Make ensure the libghc-entropy-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-entropy-dev *
You will get with libghc-entropy-dev package name, version, architecture and description in a table
| Distro | Ubuntu 17 04 zesty zapus |
| Section | Haskell |
| Package | libghc-entropy-dev |
| Version | 0.3.7-5 |
| Description | cryptographically-strong entropy |
| Sub Section | haskell |