Thanks to everyone for sending me info on how to install ghc6.6 on Ubuntu. The way I used eventually was one sent to me off list and uses the generic i86 linux at http://www.haskell.org/ghc/download_ghc_66.html#x86linux The exact steps I used after downloading the tarball at the above URL to my Desktop were: ~$ mkdir ghc-6.6 ~$ mkdir tarball ~$ mv Desktop/ghc-6.6-i386-unknown-linux.tar.bz2 tarball ~$ cd tarball ~/tarball$ tar -jxvf ghc-6.6-i386-unknown-linux.tar.bz2 ~/tarball$ sudo apt-get install libreadline4 libncurses5 ~/tarball$ cd ghc-6.6 ~/tarball/ghc-6.6$ ./configure --prefix=$HOME/ghc-6.6 ~/tarball/ghc-6.6$ make install ~/tarball/ghc-6.6$ cd ../.. ~$ gedit .bashrc& and added $HOME/ghc-6.6/bin to my PATH (must be no spaces in the line below): export PATH=$HOME/ghc-6.6/bin:$PATH Then closed the terminal and opened a new terminal and lo! ghc, ghci, and many libraries are now available! :-) Thanks again for the other suggestions also - I chose the above method just because it will allow me to easily try out different versions of ghc in future while still being able to keep the 6.6 version around just by changing my PATH to whatever version I want to use. Best regards, Brian.