sed typo and forgot to remove $ in activation

templates/nix-config/misc/activation.nix

@@ -43,7 +43,7 @@
         exit 0
       fi
 
-$PODMAN_NETWORKS
+PODMAN_NETWORKS
 
       ${pkgs.coreutils}/bin/mkdir -p /home/numbus-admin/.numbus-server/
       ${pkgs.coreutils}/bin/touch /home/numbus-admin/.numbus-server/networked.true

templates/nix-config/misc/mail.nix

@@ -21,12 +21,12 @@ in
     smtpServer = lib.mkOption {
       description = "The SMTP server address";
       type = lib.types.str;
-      default = "SENDER_EMAIL_DOMAIN";
+      default = "SENDER_MAIL_DOMAIN";
     };
     smtpUsername = lib.mkOption {
       description = "The SMTP username";
       type = lib.types.str;
-      default = "SENDER_EMAIL_ADDRESS";
+      default = "SENDER_MAIL_ADDRESS";
     };
     smtpPasswordPath = lib.mkOption {
       description = "Path to the secret containing SMTP password";