From 40d27c7ee6851c6cd189c3439e6fa041e8464c6a Mon Sep 17 00:00:00 2001
From: boubou19 <miisterunknown@gmail.com>
Date: Thu, 21 May 2026 15:48:32 +0200
Subject: [PATCH] Do not ignore the `fml.doNotBackup` property

---
 .../chunk/internal/DataRegistryImpl.java            | 13 ++++++++-----
 1 file changed, 8 insertions(+), 5 deletions(-)

diff --git a/src/main/java/com/falsepattern/chunk/internal/DataRegistryImpl.java b/src/main/java/com/falsepattern/chunk/internal/DataRegistryImpl.java
index 00d3399..ebbb1f7 100644
--- a/src/main/java/com/falsepattern/chunk/internal/DataRegistryImpl.java
+++ b/src/main/java/com/falsepattern/chunk/internal/DataRegistryImpl.java
@@ -413,11 +413,14 @@ public static void readLevelDat(NBTTagCompound tag) {
                 StartupQuery.abort();
             }
 
-            try {
-                ZipperUtil.backupWorld();
-            } catch (IOException e) {
-                StartupQuery.notify("The world backup couldn't be created.\n\n" + e);
-                StartupQuery.abort();
+            String skip = System.getProperty("fml.doNotBackup");
+            if (skip == null || !"true".equals(skip)) {
+                try {
+                    ZipperUtil.backupWorld();
+                } catch (IOException e) {
+                    StartupQuery.notify("The world backup couldn't be created.\n\n" + e);
+                    StartupQuery.abort();
+                }
             }
         }
     }