diff --git a/bootstrap.fish b/bootstrap.fish
index a71b416..8c75e6d 100755
--- a/bootstrap.fish
+++ b/bootstrap.fish
@@ -6,13 +6,13 @@ source $scriptdir/config.fish
 source $scriptdir/utils.fish
 
 if test -d $subvoldir
-	echo "Backup directory already exists, aborting..."
-	exit
+	echo "Warning: backup directory already exists."
+	echo "Existing subvolumes won't be overwritten."
+else
+	echo "Creating subvolume directory..."
+	mkdir $subvoldir
 end
 
-echo "Creating subvolume directory..."
-mkdir $subvoldir
-
 echo "Creating initial snapshots..."
 for pair in (get-subvol-mounts)
 	set subvol (get-subvol $pair)
@@ -21,9 +21,10 @@ for pair in (get-subvol-mounts)
 	set safename (clean-name $subvol)
 	set safepath $subvoldir/$safename
 
-	sudo btrfs subvolume snapshot -r $mount $safepath
-
-	set snapshots $snapshots $safepath
+	if not test -d $safepath
+		sudo btrfs subvolume snapshot -r $mount $safepath
+		set snapshots $snapshots $safepath
+	end
 end
 
 echo "Syncing..."