diff --git a/src/Makefile.global.in b/src/Makefile.global.in
index c583b44..82f0c1d 100644
--- a/src/Makefile.global.in
+++ b/src/Makefile.global.in
@@ -54,7 +54,9 @@ top_srcdir = $(abs_top_srcdir)
 srcdir = $(top_srcdir)/$(subdir)
 VPATH = $(srcdir)
 endif
-endif # not PGXS
+else # not PGXS
+NO_TEMP_INSTALL=yes
+endif # PGXS
 
 vpathsearch = `for f in $(addsuffix /$(1),$(subst :, ,. $(VPATH))); do test -r $$f && echo $$f && break; done`