Something's odd with compat-lua
    
    I think the pkgconfig file has the wrong include directory. As
    it doesn't include Lua-5.1 in the path. This sort of gets covered
    with the Cflags parameter but may be confusing the build process.
    If it looks like this is the case, I'll file a bug with compat-lua.
    
    I also did't see a lua-5.1 .so file, but I am hoping the includes
    for 5.1 actually make things work for the normal .so file.
    
    I think I also need to require compat-lua for the server.