diff --git a/package/pkg-utils.mk b/package/pkg-utils.mk
index d324934dba..14101fcc2a 100644
--- a/package/pkg-utils.mk
+++ b/package/pkg-utils.mk
@@ -112,9 +112,11 @@ define _json-info-pkg-details
 	"version": "$($(1)_DL_VERSION)",
 	"licenses": "$($(1)_LICENSE)",
 	"dl_dir": "$($(1)_DL_SUBDIR)",
-	"install_target": $(call yesno-to-bool,$($(1)_INSTALL_TARGET)),
-	"install_staging": $(call yesno-to-bool,$($(1)_INSTALL_STAGING)),
-	"install_images": $(call yesno-to-bool,$($(1)_INSTALL_IMAGES)),
+	$(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) \
+		"install_images": $(call yesno-to-bool,$($(1)_INSTALL_IMAGES))$(comma) \
+	)
 	"downloads": [
 	$(foreach dl,$(sort $($(1)_ALL_DOWNLOADS)),
 		{