Malcolm Wallace
The Haskell Platform is not like a standard user application, where it would be reasonable to have only one version installed at a time.
As far as I know, most Linux distributions only let you install one version of GHC at a time; we do this with Gentoo because despite there being some distribution-specific architecture in place to be able to switch between compilers (used for GCC, Ruby, Python, etc.) we haven't resolved how to deal with dependency problems when a library was built with one version of GHC and then you try to build something that depends upon it with another version of GHC (since the package manager _knows_ that the dependency is installed, yet GHC is vehement that it knows nothing about it). -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com IvanMiljenovic.wordpress.com