diff --git a/src/Makefile.am b/src/Makefile.am
index 2eaaf11093ae7bcbafb145019510fa9a4c4ce333..a6ea8e0abd1332b120cf7e2890c6f6ae3c91b1cc 100644
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -1053,21 +1053,12 @@ libvirt_vmx_la_SOURCES = $(VMX_SOURCES)
 endif WITH_VMX
 
 if WITH_XENCONFIG
-# Disable the default rule for lex files because we need to generate the
-# xen_xl_disk files into srcdir instead of builddir.
-.l.c:
-
-$(XENXLDISKPARSER_GENERATED): $(XENXLDISKPARSER_SOURCES)
-	$(AM_V_LEX) $(LEXCOMPILE) $<
-
-AM_LFLAGS = -Pxl_disk_ --header-file=$(abs_srcdir)/xenconfig/xen_xl_disk.h \
-		--outfile=$(abs_srcdir)/xenconfig/xen_xl_disk.c
-XENXLDISKPARSER_GENERATED = xenconfig/xen_xl_disk.c xenconfig/xen_xl_disk.h
-
-BUILT_SOURCES += $(XENXLDISKPARSER_GENERATED)
+AM_LFLAGS = -Pxl_disk_ --header-file=../$*.h
+LEX_OUTPUT_ROOT = lex.xl_disk_
+BUILT_SOURCES += xenconfig/xen_xl_disk.c xenconfig/xen_xl_disk.h
 # Generated header file is not implicitly added to dist
-EXTRA_DIST += $(XENXLDISKPARSER_GENERATED)
-MAINTAINERCLEANFILES += $(XENXLDISKPARSER_GENERATED)
+EXTRA_DIST += xenconfig/xen_xl_disk.h
+CLEANFILES += xenconfig/xen_xl_disk.h xenconfig/xen_xl_disk.c
 
 XENXLDISKPARSER_SOURCES = xenconfig/xen_xl_disk.l
 
@@ -1087,8 +1078,6 @@ libvirt_xenxldiskparser_la_CFLAGS = \
 		-I$(srcdir)/conf $(AM_CFLAGS) -Wno-unused-parameter
 libvirt_xenxldiskparser_la_SOURCES = \
 	$(XENXLDISKPARSER_SOURCES)
-libvirt_xenxldiskparser_la_DEPENDENCIES = \
-	$(XENXLDISKPARSER_GENERATED)
 
 noinst_LTLIBRARIES += libvirt_xenconfig.la
 libvirt_la_BUILT_LIBADD += libvirt_xenconfig.la