diff --git a/mkosi.conf b/mkosi.conf
index 5983d1311e..2605e062ad 100644
--- a/mkosi.conf
+++ b/mkosi.conf
@@ -6,8 +6,8 @@ MinimumVersion=20.2
 
 [Output]
 @OutputDirectory=mkosi.output
-BuildDirectory=mkosi.builddir
-CacheDirectory=mkosi.cache
+@BuildDirectory=mkosi.builddir
+@CacheDirectory=mkosi.cache
 
 [Content]
 # Prevent ASAN warnings when building the image and ship the real ASAN options prefixed with MKOSI_.