libghc-statevar-dev software package provides state variables in Haskell, you can install in your Ubuntu 14.04 LTS (Trusty Tahr) by running the commands given below on the terminal,
$ sudo apt-get update $ sudo apt-get install libghc-statevar-dev
libghc-statevar-dev is installed in your system.
Make ensure the libghc-statevar-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-statevar-dev *
You will get with libghc-statevar-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Haskell |
| Package | libghc-statevar-dev |
| Version | 1.0.0.0-4 |
| Description | state variables in Haskell |
| Sub Section | Haskell |