hotplugpath.sh file is autogenerated in xen-common 4.0.0, hence the attached patch for debian/rules.
-- Valentin
diff -ur orig/xen-common-4.0.0/debian/rules xen-common-4.0.0/debian/rules --- orig/xen-common-4.0.0/debian/rules 2010-03-01 22:03:38.000000000 +0100 +++ xen-common-4.0.0/debian/rules 2010-08-24 14:42:05.000000000 +0200 @@ -60,6 +60,7 @@ dh_testroot dh_prep $(MAKE) -C $(BUILD_DIR)/tools/examples install-configs + $(MAKE) -C $(BUILD_DIR)/tools/hotplug/common install-scripts $(MAKE) -C $(BUILD_DIR)/tools/hotplug/Linux install-udev install-scripts UDEV_RULES_DIR=/lib/udev/rules.d $(MAKE) -C $(BUILD_DIR)/scripts install