diff --git a/sets/exports.json b/sets/exports.json
index 99b4f34..5e5cba1 100644
--- a/sets/exports.json
+++ b/sets/exports.json
@@ -70,7 +70,8 @@
     "ABMK",
     "DUNE_INSTALL_AFTER",
     "DUNE_PACKAGES",
-    "DUNE_BUILD_AFTER"
+    "DUNE_BUILD_AFTER",
+    "QMAKEVER"
   ],
   "python": ["ABPY2VER", "ABPY2SHORTVER", "ABPY3VER", "ABPY3SHORTVER"]
 }
diff --git a/templates/20-qtproj.sh b/templates/20-qtproj.sh
index 1f3ab11..06b3229 100644
--- a/templates/20-qtproj.sh
+++ b/templates/20-qtproj.sh
@@ -24,10 +24,18 @@ build_qtproj_configure() {
 	else
 		abdie "Unknown qmake version: ${QMAKEVER}."
 	fi
+
+	export QTPROJ_SPEC
+	if bool "$USECLANG"; then
+		QTPROJ_SPEC=" -spec linux-clang "
+	else
+		QTPROJ_SPEC=" -spec linux-g++ "
+	fi
+
 	ab_tostringarray QTPROJ_AFTER
 	ab_typecheck -a QTPROJ_DEF
 	abinfo "Running ${QMAKE} to generate Makefile ..."
-	"/usr/bin/${QMAKE}" "${QTPROJ_DEF[@]}" "${QTPROJ_AFTER[@]}" \
+	"/usr/bin/${QMAKE}" $QTPROJ_SPEC "${QTPROJ_DEF[@]}" "${QTPROJ_AFTER[@]}" \
 		|| abdie "Failed while running qmake to generate Makefile: $?."
 }