src/Pure/Tools/phabricator.scala

     override def packages(): List[String] = List("nginx", "php-fpm")
 
     override def site_init(name: String, server_name: String, webroot: String): Unit = {
       File.write(site_conf(name),
 """server {
+  listen 80;
+  listen [::]:80;
+
   server_name """ + server_name + """;
   root """ + webroot + """;
 
   location / {
     index index.php;