--- ./tools/Makefile.orig
+++ ./tools/Makefile
@@ -202,6 +202,7 @@
 		--localstatedir=/var \
 		--disable-kvm \
 		--disable-docs \
+		--with-coroutine=gthread \
 		--disable-guest-agent \
 		--python=$(PYTHON) \
 		$(IOEMU_CONFIGURE_CROSS); \
