diff --git a/modules/system/backups.nix b/modules/system/backups.nix
index 51ea96c..4427e12 100644
--- a/modules/system/backups.nix
+++ b/modules/system/backups.nix
@@ -60,7 +60,7 @@ in
             --stats \
             --show-rc \
             --compression lz4 \
-            "$BORG_REPO::${toString config.networking.hostName}-${timestamp}" \
+            "$BORG_REPO::${toString config.networking.hostName}-$timestamp" \
             ${lib.concatStringsSep " " cfg.paths}
 
           # Prune old backups according to retention policy
@@ -70,7 +70,7 @@ in
             --keep-weekly=52 \
             --keep-monthly=-1
 
-          echo "${timestamp} - backup completed successfully."
+          echo "$timestamp - backup completed successfully."
         '';
       };
     };