dan[bench]$ ocamlbuild examples/listmap.native
Finished, 0 targets (0 cached) in 00:00:00.
findlib: [WARNING] Package oUnit has multiple definitions in /home/dan/.odb/lib/oUnit/META, /home/dan/ocaml/godi/lib/ocaml/pkg-lib/oUnit/META
+ ocamlfind ocamlopt unix.cmxa -g -linkpkg -package batteries src/bench.cmx examples/listmap.cmx -o examples/listmap.native
File "_none_", line 1, characters 0-1:
Error: No implementations provided for the following modules:
         Batteries referenced from examples/listmap.cmx
Command exited with code 2.
Compilation unsuccessful after building 8 targets (0 cached) in 00:00:00.