diff --git a/audio/carla/Makefile b/audio/carla/Makefile
index 65f6ef3bbc18..c9a14c4b8b29 100644
--- a/audio/carla/Makefile
+++ b/audio/carla/Makefile
@@ -33,6 +33,7 @@ GH_ACCOUNT=	falkTX
 
 MAKE_ARGS=	HAVE_QT4=false \
 		EXTERNAL_PLUGINS=false \
+		PREFIX=${LOCALBASE} \
 # Give the Makefile the proper versioned binaries of PyQt
 BINARY_ALIAS=	pyuic5=${LOCALBASE}/bin/pyuic5-${PYTHON_VER} \
 		pyrcc5=${LOCALBASE}/bin/pyrcc5-${PYTHON_VER}