--- a/common/protocol/Makefile.am	2017-11-16 22:50:02.024523197 +0000
+++ a/common/protocol/Makefile.am	2017-12-19 09:47:45.809947629 +0000
@@ -34,7 +34,7 @@ 
 # warnings here.
 libprotocol_la_SOURCES = guestfs_protocol.c  guestfs_protocol.h
 libprotocol_la_CFLAGS = \
-	-Wall -Wno-unused -fno-strict-aliasing $(GCC_VISIBILITY_HIDDEN)
+	-Wall -Wno-unused -fno-strict-aliasing $(GCC_VISIBILITY_HIDDEN) $(RPC_CFLAGS)
 
 if HAVE_RPCGEN
 RPCGEN_DEFS =
--- a/fish/Makefile.am	2017-11-16 22:50:02.101523178 +0000
+++ a/fish/Makefile.am	2017-12-19 09:51:49.041063222 +0000
@@ -101,7 +101,7 @@ 
 # This convenience library is solely to compile its generated sources with
 # custom flags.
 librc_protocol_la_SOURCES = rc_protocol.c rc_protocol.h
-librc_protocol_la_CFLAGS = -Wall -Wno-unused -fno-strict-aliasing
+librc_protocol_la_CFLAGS = -Wall -Wno-unused -fno-strict-aliasing $(RPC_CFLAGS)
 
 # Build the command lookup perfect hash code.  The generated code has
 # lots of warnings so we must compile it in a separate mini-library.
--- a/localenv	1970-01-01 01:00:00.000000000 +0100
+++ a/localenv	2017-12-19 10:35:56.724217122 +0000
@@ -0,0 +1, @@ 
+RPC_CFLAGS = -I/usr/include/tirpc
--- a/daemon/Makefile.am	2017-11-16 22:50:02.052523190 +0000
+++ a/daemon/Makefile.am	2017-12-19 10:53:11.091290471 +0000
@@ -209,7 +209,8 @@ 
 	$(HIVEX_CFLAGS) \
 	$(SD_JOURNAL_CFLAGS) \
 	$(YAJL_CFLAGS) \
-	$(PCRE_CFLAGS)
+	$(PCRE_CFLAGS) \
+	$(RPC_CFLAGS)
 
 # Manual pages and HTML files for the website.
 if INSTALL_DAEMON
--- a/lib/Makefile.am	2017-11-16 22:50:02.175523160 +0000
+++ a/lib/Makefile.am	2017-12-19 10:55:46.726467764 +0000
@@ -145,7 +145,8 @@ 
 	$(PCRE_CFLAGS) \
 	$(LIBVIRT_CFLAGS) \
 	$(LIBXML2_CFLAGS) \
-	$(YAJL_CFLAGS)
+	$(YAJL_CFLAGS) \
+	$(RPC_CFLAGS)
 
 libguestfs_la_LIBADD = \
 	../common/errnostring/liberrnostring.la \
@@ -194,7 +195,8 @@ 
 
 libvirt_is_version_CFLAGS = \
 	$(WARN_CFLAGS) $(WERROR_CFLAGS) \
-	$(LIBVIRT_CFLAGS)
+	$(LIBVIRT_CFLAGS) \
+	$(RPC_CFLAGS)
 endif
 
 # Tests: main tests are in tests/c-api.  Here we just have some
@@ -212,7 +214,7 @@ 
 	-I$(top_srcdir)/common/utils -I$(top_builddir)/common/utils \
 	-I$(top_srcdir)/lib -I.
 unit_tests_CFLAGS = \
-	$(WARN_CFLAGS) $(WERROR_CFLAGS)
+	$(WARN_CFLAGS) $(WERROR_CFLAGS) $(RPC_CFLAGS)
 # We have to link this to libguestfs, but because we want to test
 # non-exported functions we have to link with the objects not the
 # library.
--- a/fish/Makefile.am	2017-12-19 11:02:42.617558130 +0000
+++ a/fish/Makefile.am	2017-12-19 11:11:04.419079589 +0000
@@ -110,7 +110,7 @@ 
 	-I$(top_srcdir)/common/utils -I$(top_builddir)/common/utils \
 	-I$(top_srcdir)/lib -I$(top_builddir)/lib \
 	-I$(srcdir)/../gnulib/lib -I../gnulib/lib
-libcmds_la_CFLAGS =
+libcmds_la_CFLAGS = $(RPC_CFLAGS)
 libcmds_la_LIBADD = \
 	$(top_builddir)/common/utils/libutils.la \
 	$(LTLIBINTL)
@@ -134,7 +134,8 @@ 
 guestfish_CFLAGS = \
 	$(WARN_CFLAGS) $(WERROR_CFLAGS) \
 	$(LIBCONFIG_CFLAGS) \
-	$(LIBXML2_CFLAGS)
+	$(LIBXML2_CFLAGS) \
+	$(RPC_CFLAGS)
 
 guestfish_LDADD = \
 	$(top_builddir)/common/edit/libedit.la \