diff --git a/mkosi/mkosi.conf.d/extra-search-path.conf b/mkosi/mkosi.conf.d/extra-search-path.conf
index b7308f7f21..b445c58f0a 100644
--- a/mkosi/mkosi.conf.d/extra-search-path.conf
+++ b/mkosi/mkosi.conf.d/extra-search-path.conf
@@ -1,7 +1,7 @@
 # SPDX-License-Identifier: LGPL-2.1-or-later
 
 [Match]
-PathExists=build/
+PathExists=%D/build
 
 [Build]
-ExtraSearchPaths=build/
+ExtraSearchPaths=%D/build