diff --git a/lib/modules/partition/disks.nix b/lib/modules/partition/disks.nix
index ba783123..a0dd0947 100644
--- a/lib/modules/partition/disks.nix
+++ b/lib/modules/partition/disks.nix
@@ -102,7 +102,9 @@ let
 
         cleanup = lib.strings.concatLines (builtins.map
           (partition: "${fdiskCommand "--delete ${diskVar} ${toString partition.index}"} || true")
-          (builtins.filter (_: !_.keepExisting) partitions));
+          (lib.lists.sortOn
+            (partition: partition.index * -1)
+            (builtins.filter (_: !_.keepExisting) partitions)));
 
         fdiskCommands = lib.strings.concatLines
           (lib.optionals config.wipe [