Re-introduce nonexistent dependency check
Re-introduce nonexistent dependency check

caolan/async,jnordberg/async,steverobb/async,hargasinski/async,caolan/async,arigo-software/async,ecasilla/async,arigo-software/async,andalm/async,jnordberg/async,rlugojr/async,suguru03/async,ecasilla/async,rlugojr/async,steverobb/async,ezubarev/async,hargasinski/async,andalm/async,ezubarev/async,suguru03/async