[99s-extend] Getting started error: behaviour cowboy_http_handler undefined

[lloyd at writersglen.com]

Hello,

I've slavishly emulated the "Getting started" example in the guide: 

http://ninenines.eu/docs/en/cowboy/HEAD/guide/getting_started/

But, when I compile I get this error:

yada yada
 ERLC   hello_erlang_app.erl hello_handler.erl hello_erlang_sup.erl
compile: warnings being treated as errors
src/hello_handler.erl:2: behaviour cowboy_http_handler undefined
make: *** [ebin/hello_erlang.app] Error 1

Cowboy seems to be correctly loaded and compiled as a dependency. I can see .../cowboy/ebin/cowboy_http_handler.beam

However, when I remove the line -behavior(cowboy_http_handler) from hello_handler.erl, system compiles and creates release just fine.

% -behavior(cowboy_http_handler).

Could this be a bug in Getting started or some dunder-headed thing on my end?

Thanks,

LRP


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