Hello! Does anybody here uses GHC on Linux with SELinux turned on? I've just installed SELinux and run into GHC/SELinux incompatibility. It seems that the similar problem was reported some time ago and was fixed in 6.4.3. However, I use 6.6.1 and the problem is still here. $ ghc ghc-6.6.1: internal error: getMBlock: mmap: Permission denied (GHC version 6.6.1 for i386_unknown_linux) Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug Exactly the same bug is appearing on x86_64 architecture. Much more details is available at http://hackage.haskell.org/trac/ghc/ticket/738 Any ideas? With best regards, Alexander. PS. Is it possible to turn on global allow_execmem boolean in SELinux policy, thus enabling executable memory mapping. This solves the problem. However, this is major drawback for system security and should be avoided at any cost.