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It's not often two things I love so much come together to cause me so much annoyance (besides my kids). I've written a Haskell program at work that uses libraries like text, xml-enumerator, attoparsec-text, etc. I have it working properly on my Windows machine at work, my Ubuntu virtual machine at work (32-bit), my Ubuntu desktop (32-bit again) and an EC2 instance running Ubuntu (64-bit). Our client is running CentOS 5.3, 64-bit. I can't for the life of me get this executable to run properly. I tried creating a static executable using: ghc --make myprog.hs -optl-static -optl-pthread But when I try to run that executable on the CentOS server, I get an error message: openFile: invalid argument (Invalid argument) I'm assuming this is related to the bug described here . I've tried compiling from both 32 and 64 bit Ubuntu, tried static and shared builds, nothing works (though I occasionally get segfaults instead of the above error message). I can try downloading CentOS 5.3 and creating a virtual machine for it, but it will take a while to download, and I'm not sure which version of GHC will work on it (I tried getting GHC 7 on their server, but I ran into a libc issue). At this point, I've come up with a few possible approaches, but I'd like to avoid these if at all possible: Rewrite in a different language (the thought of doing this in Java makes me queasy, though it could be a nice time to try out Cal/OpenQuark). Maybe try out an alternate compiler, like jhc. But I'm not quite certain how to get started installing all the dependencies for this program in jhc; if people have experience and know that text/attoparsec/etc work in jhc, I'd love to hear it. Hack of all hacks: build a Windows executable, install wine on their server and run it that way. As a total aside, these are

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