Index: Makefile.in
==================================================================
--- Makefile.in
+++ Makefile.in
@@ -40,11 +40,11 @@
 	@srcdir@/gen_dh_params @GEN_DH_PARAMS_ARGS@ > dh_params.h.new
 	mv dh_params.h.new dh_params.h
 
 # Generic target for building files from the "srcdir"
 # tree -- the default target will not match paths
-%.o: @srcdir@/%.c
+.c.o:
 	$(CC) $(CPPFLAGS) $(CFLAGS) -o "$@" -c "$<"
 
 # Install the extension
 install: @EXTENSION_TARGET@ pkgIndex.tcl
 	$(INSTALL) -d '$(DESTDIR)$(PACKAGE_INSTALL_DIR)'