diff --git a/root.pro b/root.pro
index c5fecb7..c191a4e 100644
--- a/root.pro
+++ b/root.pro
@@ -2,7 +2,11 @@ TEMPLATE = subdirs
 
 SUBDIRS = src tests type-to-cxx
 
-prf.path =  $$[QT_INSTALL_DATA]/mkspecs/features
+greaterThan(QT_MAJOR_VERSION, 4) {
+    prf.path = $$[QT_HOST_DATA]/mkspecs/features
+} else {
+    prf.path = $$[QT_INSTALL_DATA]/mkspecs/features
+}
 prf.files = iodata-qt5.prf
 
 INSTALLS = prf