ERTS_INCLUDE_DIR ?= /Users/martinsumner/erlang/18.3/erts-7.3/include/
ERL_INTERFACE_INCLUDE_DIR ?= /Users/martinsumner/erlang/18.3/lib/erl_interface-3.8.2/include
ERL_INTERFACE_LIB_DIR ?= /Users/martinsumner/erlang/18.3/lib/erl_interface-3.8.2/lib