diff --git a/mkosi/mkosi.conf b/mkosi/mkosi.conf
index 37381e593a..d3c463fee8 100644
--- a/mkosi/mkosi.conf
+++ b/mkosi/mkosi.conf
@@ -10,6 +10,7 @@ Dependencies=
         minimal-1
 
 PassEnvironment=
+        NO_SYNC
         NO_BUILD
         WIPE
         SANITIZERS