Set LEIN_BUILD_TASK if lein isn't in Procfile.
Set LEIN_BUILD_TASK if lein isn't in Procfile.

jkutner/heroku-buildpack-lein,heroku/heroku-buildpack-clojure,nvbn/heroku-buildpack-clojure,cloudControl/buildpack-clojure,cedricpineau/heroku-buildpack-clojure-phantomjs,heroku/heroku-buildpack-clojure