test.hs: /home/ubuntu/.cabal/lib/persistent-sqlite-1.0.0/ghc-7.4.1/HSpersistent-sqlite-1.0.0.o:
unknown symbol `stat64'
test.hs: test.hs: unable to load package `persistent-sqlite-1.0.0'
The immediate cause is that some C source file is calling stat() or lstat() without the right #include files; they go through several levels of backward compatibility macros that end in different system calls. Alternately, something is trying to use one of those functions via the FFI instead of System.Posix.File.