Index: Makefile.in
==================================================================
--- Makefile.in
+++ Makefile.in
@@ -52,11 +52,11 @@
 	$(CC) $(CPPFLAGS) $(CFLAGS) -o "$@" -c "$<"
 
 # Install the extension
 install: @EXTENSION_TARGET@ pkgIndex.tcl
 	$(INSTALL) -d '$(DESTDIR)$(PACKAGE_INSTALL_DIR)'
-	$(INSTALL) -t '$(DESTDIR)$(PACKAGE_INSTALL_DIR)' @EXTENSION_TARGET@ pkgIndex.tcl
+	$(INSTALL) -c @EXTENSION_TARGET@ pkgIndex.tcl '$(DESTDIR)$(PACKAGE_INSTALL_DIR)'
 
 # Test target, run the automated test suite
 test: @EXTENSION_TARGET@
 	@TCLSH_PROG@ @srcdir@/tests/all.tcl $(TESTFLAGS) -load "lappend auto_path $(shell pwd)"