diff --git a/repos/libports/src/app/qt5/tmpl/target_defaults.inc b/repos/libports/src/app/qt5/tmpl/target_defaults.inc
index a3a42736d2..eccd801443 100644
--- a/repos/libports/src/app/qt5/tmpl/target_defaults.inc
+++ b/repos/libports/src/app/qt5/tmpl/target_defaults.inc
@@ -13,9 +13,13 @@ PROJECT_DIR_NAME = $(notdir $(abspath $(PRG_DIR)))
 
 QMAKE_PROJECT_FILE ?= $(realpath $(PRG_DIR)/$(PROJECT_DIR_NAME).pro)
 
+ifneq ($(call select_from_ports,qoost),)
+ifneq ($(call select_from_ports,qt5),)
 ifneq ($(strip $(QMAKE_PROJECT_FILE)),)
 include $(QMAKE_PROJECT_FILE)
 endif
+endif
+endif
 
 # how to name the generated executable
 # (if not already defined in the qmake project file)