Dear John, et al. I will be trying jhc out, because it sounds like a good idea for some of my number-crunching apps. I just wanted to tell you how my build with ghc-6.10.1 (out-of-the-box) went, although it's not completely fair, because I may have some things from hackage installed already. Anyhow, I followed your requirement list (binary,zlib,utf8-string) and ran into the following missing dependencies: readline fgl These were removed from ghc and extralibs, resp. You may want to list these on your installation page for 6.10 builds. Also, people may like to be pointed to this ticket (I ran into this): http://hackage.haskell.org/trac/ghc/ticket/2897 Two more things that struck me: - After the installation of jhc, I just had to try it: took a clean directory fresh from the tarball, did ./configure --with-hc=jhc && make. Unfortunately: /home/holzensp/usr/bin/jhc -I./StringTable -I./cbits -I./cbits -optc-std=c99 -optc-O2 -optc-Wall StringTable/StringTable_cbits.c -c -o StringTable/StringTable_cbits.o Error: Module not found: StringTable/StringTable_cbits.c make[1]: *** [StringTable/StringTable_cbits.o] Error 1 - After the initial installation a directory appeared in my $HOME/usr/share, called jhc-0.5. It seems not all version numbers were bumped ;) Regards, Philip