--- a/Makefile
+++ b/Makefile
@@ -7,6 +7,9 @@
 MY_OBJ_DIR ?= $(CURDIR)/obj
 REPO ?= $(CURDIR)
 
+OCAMLPATH=/usr/lib/xen-4.1/lib/ocaml
+export OCAMLPATH
+
 RPM_SPECSDIR?=$(shell rpm --eval='%_specdir')
 RPM_SRPMSDIR?=$(shell rpm --eval='%_srcrpmdir')
 RPM_SOURCESDIR?=$(shell rpm --eval='%_sourcedir')
