Installation instructions [1] for Debian 8 Jessie 64-bits currently says... sudo dpkg --add-architecture i386 sudo apt-get update sudo apt-get install ia32-libs sudo apt-get install libx11-6:386 sudo apt-get install libgl1-mesa-glx:i386 sudo apt-get install libfontconfig1:i386 sudo apt-get install libssl1.0.0:i386 However I get an error... ia32-libs is not available The top answer at [2] describes why... The ia32-libs package was a hack to get 32-bit packages installed on a 64-bit installation. Since Ubuntu version 11.10 (Oneiric), Multi Arch has been added. One of the objectives for it is removing the ia32-libs package. [1] http://pharo.org/gnu-linux-installation [2] http://askubuntu.com/questions/107230/what-happened-to-the-ia32-libs-package and indeed, after removing that line, the following worked for me... sudo dpkg --add-architecture i386 sudo apt-get update sudo apt-get install libx11-6:i386 sudo apt-get install libgl1-mesa-glx:i386 sudo apt-get install libfontconfig1:i386 sudo apt-get install libssl1.0.0:i386 Could this perhaps be updated on the web site. btw, note that libx11-6:386 is missing an "i" I've logged https://pharo.fogbugz.com/default.asp?17198 cheers -ben