I had trouble installing the generic 64-bit Linux tarball for 7.6.3. With some help from Ian, who pointed out that the problem was related to ld-linux.so, I finally figured out the root of the problem: the installation requires *both* the 64-bit and 32-bit versions of libc6 plus deps to be available. Once the installation was complete, I could then remove the 32-bit libs and ghc still seems to work. It appears that the 32-bit libs are only required for some of the auxiliary executables that come with the tarball, such as ghc-pwd. Is there any reason in principle that we only allow 64-bit GHC to be installed on multiarch Linux? That seems like a rather arbitrary restriction. In the meantime, something ought to be said about this on the download page. More details: the target system for the installation in my case was an up-to-date Ubuntu 12.04 LTS (precise) amd64 headless server running in a VMware containter. Thanks, Yitz