$ sudo apt-get update
$ sudo apt-get install libghc-haskelldb-hdbc-postgres

libghc-haskelldb-hdbc-postgres is installed in your system.

Make ensure the libghc-haskelldb-hdbc-postgres package were installed using the commands given below,

$ sudo dpkg-query -l | grep libghc-haskelldb-hdbc-postgres*

You will get with libghc-haskelldb-hdbc-postgres package name, version, architecture and description in a table

libghc-haskelldb-hdbc-postgres package basic information: