libghc-monoid-subclasses-dev software package provides subclasses of Monoid, 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-monoid-subclasses-dev
libghc-monoid-subclasses-dev is installed in your system.
Make ensure the libghc-monoid-subclasses-dev package were installed using the commands given below,
$ sudo dpkg-query -l | grep libghc-monoid-subclasses-dev *
You will get with libghc-monoid-subclasses-dev package name, version, architecture and description in a table
| Distro | Ubuntu 14 04 lts trusty tahr |
| Section | Haskell |
| Package | libghc-monoid-subclasses-dev |
| Version | 0.3.5-1 |
| Description | subclasses of Monoid |
| Sub Section | Haskell |