diff --git a/postfixadmin.nix b/postfixadmin.nix
index 8b4b331..02e7e52 100644
--- a/postfixadmin.nix
+++ b/postfixadmin.nix
@@ -44,7 +44,7 @@ in
         # NOTE: You should have "cgi.fix_pathinfo = 0;" in php.ini
         fastcgi_split_path_info ^(.+\.php)(/.+)$;
         # With php5-cgi alone:
-        fastcgi_pass ${phpfpmHostPort};
+        fastcgi_pass unix:${config.services.phpfpm.pools."${phppoolName}".socket};
         fastcgi_index index.php;
         fastcgi_param  GATEWAY_INTERFACE  CGI/1.1;
         fastcgi_param  SERVER_SOFTWARE    nginx;
@@ -82,7 +82,6 @@ in
     '';
   };
   services.phpfpm.pools."${phppoolName}" = {
-    listen = phpfpmHostPort;
     user = "${pfaUser}";
     group = "${pfaGroup}";
     extraConfig = ''
diff --git a/roundcube.nix b/roundcube.nix
index 4256d2e..acd129f 100644
--- a/roundcube.nix
+++ b/roundcube.nix
@@ -57,7 +57,7 @@ in
             return 404;
         }
     
-        fastcgi_pass ${config.variables.roundcubePhpfpmHostPort};
+        fastcgi_pass unix:${config.services.phpfpm.pools."${poolName}".socket};
         fastcgi_index index.php;
 
         fastcgi_param   QUERY_STRING            $query_string;
@@ -107,7 +107,6 @@ in
     '';
   };
   services.phpfpm.pools."${poolName}" = {
-    listen = config.variables.roundcubePhpfpmHostPort;
     user = "${config.variables.roundcubeUser}";
     group = "${config.variables.roundcubeUser}";
     extraConfig = ''