diff --git a/backup.nix b/backup.nix
index 90cf87b..17788a7 100644
--- a/backup.nix
+++ b/backup.nix
@@ -12,8 +12,6 @@ let
 
   backupConfigFile = "/etc/misskey-backup/conf";
   s3Cfg = "/etc/misskey-backup/s3cfg";
-
-  tarRedisStdoutCmd = "tar -cz -C /var/lib/redis-misskey .";
 in {
   users.users."${user}" = {
     isSystemUser = true;
@@ -44,8 +42,6 @@ in {
     ];
 
     script = ''
-      set -o pipefail
-
       ageRecipient="age17ckyc69njpryytc63ynn545jswyucg28k5xg3043g3j6q38dxqwq0wzhm2"
       bucket="$(grep 'bucket=' < "${backupConfigFile}" | sed 's/bucket \?= \?//g')"
       prefix="$(grep 'prefix=' < "${backupConfigFile}" | sed 's/prefix \?= \?//g')"
@@ -66,7 +62,7 @@ in {
       pg_dump misskey | gzip | upload "pg_dump.sql.gz"
 
       echo "Uploading redis database..."
-      sudo ${tarRedisStdoutCmd} | upload "redis.tar.gz"
+      tar -cz -C /var/lib/redis-misskey . | upload "redis.tar.gz"
 
       echo "Backup complete to '$s3Dir'"
     '';
@@ -77,12 +73,4 @@ in {
   };
 
   systemd.timers.misskey-backup = { timerConfig.Persistent = true; };
-
-  security.sudo.extraRules = [{
-    groups = [ group ];
-    commands = [{
-      command = tarRedisStdoutCmd;
-      options = [ "NOPASSWD" ];
-    }];
-  }];
 }
diff --git a/postfix.nix b/postfix.nix
index c9654b1..600a5d3 100644
--- a/postfix.nix
+++ b/postfix.nix
@@ -18,6 +18,6 @@
     enable = true;
     selector = "default";
     socket = "inet:8891@127.0.0.1";
-    domains = "csl:${config.networking.fqdn},admin.${config.networking.fqdn}";
+    domains = "csl:${config.networking.fqdn}";
   };
 }