diff --git a/package/pkg-utils.mk b/package/pkg-utils.mk
index b6c6aeeb40..66504d0be2 100644
--- a/package/pkg-utils.mk
+++ b/package/pkg-utils.mk
@@ -100,6 +100,7 @@ define _json-info-pkg
 		"virtual": false$(comma)
 		$(call _json-info-pkg-details,$(1)) \
 	)
+	"build_dir": "$(patsubst $(BASE_DIR)/%,%,$($(1)_BUILDDIR))",
 	$(if $(filter target,$($(1)_TYPE)), \
 		"install_target": $(call yesno-to-bool,$($(1)_INSTALL_TARGET))$(comma) \
 		"install_staging": $(call yesno-to-bool,$($(1)_INSTALL_STAGING))$(comma) \