fix buildpack version output after adding dokku/buildpack-nginx
fix buildpack version output after adding dokku/buildpack-nginx

gliderlabs/herokuish,expa/herokuish,expa/herokuish,gliderlabs/herokuish,expa/herokuish,expa/herokuish,gliderlabs/herokuish,expa/herokuish,expa/herokuish,expa/herokuish,gliderlabs/herokuish,gliderlabs/herokuish,gliderlabs/herokuish,expa/herokuish,gliderlabs/herokuish,gliderlabs/herokuish