nixosTests.rss2email: fixup for new dovecot module

nixos/tests/rss2email.nix

@@ -3,7 +3,7 @@ import ./make-test-python.nix {
 
   nodes = {
     server =
-      { pkgs, ... }:
+      { config, pkgs, ... }:
       {
         imports = [ common/user-account.nix ];
         services.nginx = {
@@ -33,9 +33,14 @@ import ./make-test-python.nix {
         };
         services.dovecot2 = {
           enable = true;
-          enableImap = true;
-          mailLocation = "maildir:~/mail";
-          protocols = [ "imap" ];
+          enablePAM = true;
+          settings = {
+            dovecot_config_version = "2.4.3";
+            dovecot_storage_version = config.services.dovecot2.package.version;
+            mail_driver = "maildir";
+            mail_path = "~/mail";
+            protocols.imap = true;
+          };
         };
         environment.systemPackages =
           let
@@ -67,7 +72,7 @@ import ./make-test-python.nix {
     server.systemctl("start network-online.target")
     server.wait_for_unit("network-online.target")
     server.wait_for_unit("opensmtpd")
-    server.wait_for_unit("dovecot2")
+    server.wait_for_unit("dovecot")
     server.wait_for_unit("nginx")
     server.wait_for_unit("rss2email")