Hi all, I've been recently toying with a small tool inspired by the Python tool virtualenv [1]. What it basically allows to do is to setup isolated, disposable package environments. You can find a small session example in: http://www.haskell.org/haskellwiki/PkgEnv The main benefits should be: 1. allowing experimenting with package installations without "polluting" or breaking the default user package DB. When you're done you can simply remove the pkgenv directory => disposable 2. starting from a clean, fresh pkg "configuration" containing only system packages. This make cabal-install dependency analysis job much easier and predictable => isolated pkgenv now only runs on unix, even if it could be possible to port it to windows... To test it, download it from http://bitbucket.org/pao/pkgenv/raw/488bfe8e58dd/pkgenv chmod a+x and drop to an executable directory. Any feedback would be really appreciated. Is this useful at all? Are there better ways to reach the same goals? Pao 1. http://pypi.python.org/pypi/virtualenv