--- tclex-1.2a1.orig/src/Makefile
+++ tclex-1.2a1/src/Makefile
@@ -55,7 +55,8 @@
 	(if test -f $(PROJECTDIR)/pkgIndex.tcl; \
 	    then grep -v $(PROJECT_VERSION) $(PROJECTDIR)/pkgIndex.tcl; \
 	else true; fi;) | \
-	echo 'package ifneeded $(PROJECT) $(PROJECT_VERSION) [list load [file join $$dir $(DLL).$(PROJECT_VERSION)] $(PROJECT)]' > pkgIndex.tcl
+	echo 'if {[package vcompare [info tclversion] 8.5] >= 0} return' > pkgIndex.tcl && \
+ 	echo 'package ifneeded $(PROJECT) $(PROJECT_VERSION) [list load [file join $$dir $(DLL).$(PROJECT_VERSION)] $(PROJECT)]' >> pkgIndex.tcl
 
 install: all
 	if test ! -d $(PROJECTDIR); then mkdir $(PROJECTDIR); fi
--- tclex-1.2a1.orig/src/Makefile.in
+++ tclex-1.2a1/src/Makefile.in
@@ -54,7 +54,8 @@
 	(if test -f $(PROJECTDIR)/pkgIndex.tcl; \
 	    then grep -v $(PROJECT_VERSION) $(PROJECTDIR)/pkgIndex.tcl; \
 	else true; fi;) | \
-	echo 'package ifneeded $(PROJECT) $(PROJECT_VERSION) [list load [file join $$dir $(DLL).$(PROJECT_VERSION)] $(PROJECT)]' > pkgIndex.tcl
+	echo 'if {[package vcompare [info tclversion] 8.5] >= 0} return' > pkgIndex.tcl && \
+ 	echo 'package ifneeded $(PROJECT) $(PROJECT_VERSION) [list load [file join $$dir $(DLL).$(PROJECT_VERSION)] $(PROJECT)]' >> pkgIndex.tcl
 
 install: all
 	if test ! -d $(PROJECTDIR); then mkdir $(PROJECTDIR); fi