diff --git a/nix/os/containers/backup.nix b/nix/os/containers/backup.nix
index 8b9a3d3..19b91a4 100644
--- a/nix/os/containers/backup.nix
+++ b/nix/os/containers/backup.nix
@@ -139,6 +139,13 @@ in args // {
         done
         sync
         echo Finished rdup/rdedup backup...
+
+        echo Removing all previous backups...
+        rdedup --dir=${bkpDestination}/rdedup list | grep -v ''${TIMESTAMP} | xargs echo rdedup --dir=${bkpDestination}/rdedup remove
+
+        echo Running rdedup garbage-collector...
+        time rdedup -v -ttt --dir=${bkpDestination}/rdedup gc
+
         echo Determining backup destination size ${bkpDestination}/rdedup...
         du -hs ${bkpDestination}/rdedup
       '';