Compiling mod_http_pre_bind problems: undefined callback function init/1

I'm having problems getting mod_http_pre_bind to work. I've been unsuccessful in my attempts to contact the author(s), but the source is here:

http://github.com/thepug/Mod-Http-Pre-Bind/tree/master/src/web/

The problem I get is that GET requests (handled by mod_http_pre_bind) return the proper status message but POST requests (handled by ejabberd_http_pre_bind) give an empty response (no HTTP headers or body).

When compiling I get the following warnings, which I assume are indicative of the problem (especially because ejabberd_http_pre_bind seems to be the one with issues):

[root@boxie Mod-Http-Pre-Bind]# ./build.sh

Recompile: src/web/ejabberd_http_pre_bind
src/web/ejabberd_http_pre_bind.erl:9: Warning: undefined callback
function handle_event/3 (behaviour 'gen_fsm')
src/web/ejabberd_http_pre_bind.erl:9: Warning: undefined callback
function handle_info/3 (behaviour 'gen_fsm')
src/web/ejabberd_http_pre_bind.erl:9: Warning: undefined callback
function handle_sync_event/4 (behaviour 'gen_fsm')
src/web/ejabberd_http_pre_bind.erl:9: Warning: undefined callback
function init/1 (behaviour 'gen_fsm')
src/web/ejabberd_http_pre_bind.erl:9: Warning: undefined callback
function terminate/3 (behaviour 'gen_fsm')

Recompile: src/web/mod_http_pre_bind
src/web/mod_http_pre_bind.erl:17: Warning: behaviour gen_mod undefined

My experience with Erlang is limited, but these seem like library/export issues that I should be able to resolve myself? Alternatively, can somebody with a working setup compile the modules for me?