This document introduces virthualenvwrapper, a tool for Haskell that allows creating and managing isolated virtual environments for Haskell projects similarly to virtualenvwrapper for Python. It describes how to install virthualenvwrapper from GitHub, create a new virtual environment called "testenv", switch between environments, and list all existing environments. The goal is to provide a convenient way to manage multiple Haskell toolchains and package configurations.