Hi all, I'm new to both this list and Haskell, so apologies if these questions have been answered before or seem obvious. I've trawled the website and my suspicion is that I'm using a 'too new' version of the compiler that doesn't support GranSim. Anyway: I'm trying to set up a ghc. I want to compile GPH programs and run them on GranSim. With my current setup (details at the bottom of the mail) I get the following error when I try to compile a GPH program: [mjb67@mjb67 mjb67]$ ghc -gransim -fvia-c -fglasgow-exts --make parfib.hs ghc-5.02.1: can't find module `Prelude' Does anyone have any idea what I might be doing wrong? The error is reported even when the program is normal Haskell, whenever I use the -gransim or -parallel options to the compiler. I presume this is some sort of library issue? My compiler was set up in the following way: I installed the binary RPMs: http://www.haskell.org/ghc/dist/5.02.1/ghc-5.02.1-rh71-1.i386.rpm http://www.haskell.org/happy/dist/1.11/happy-1.11-1.i386.rpm I downloaded the source RPM from: http://www.haskell.org/ghc/dist/5.02.1/ghc-5.02.1-rh71-1.src.rpm I unpacked the source. I then typed (in the source root directory) ./configure --enable-gransim make make install Thanks in advance, Matthew