diff --git a/mach/sun3/libcc.ansi/makefile b/mach/sun3/libcc.ansi/makefile
index 4cd1c7e23..f1c703cb8 100644
--- a/mach/sun3/libcc.ansi/makefile
+++ b/mach/sun3/libcc.ansi/makefile
@@ -18,8 +18,8 @@ cphead: head_$(PREF).e
 head_$(PREF).e: libsrc
 
 libsrc: $(EMHOME)/lang/cem/libcc.ansi/libsrc .
-	cp $(EMHOME)/lang/cem/libcc.ansi/libsrc .
-	tar xf libsrc
+	tar xf $(EMHOME)/lang/cem/libcc.ansi/libsrc
+	touch libsrc
 
 cmp:	cmplibc cmphead
 	-../../compare $(OLIB)
diff --git a/mach/vax4/libcc.ansi/makefile b/mach/vax4/libcc.ansi/makefile
index de67d098d..ed16c901d 100644
--- a/mach/vax4/libcc.ansi/makefile
+++ b/mach/vax4/libcc.ansi/makefile
@@ -18,8 +18,8 @@ cphead: head_$(PREF).e
 head_$(PREF).e: libsrc
 
 libsrc: $(EMHOME)/lang/cem/libcc.ansi/libsrc .
-	cp $(EMHOME)/lang/cem/libcc.ansi/libsrc .
-	tar xf libsrc
+	tar xf $(EMHOME)/lang/cem/libcc.ansi/libsrc
+	touch libsrc
 
 cmp:	cmplibc cmphead
 	-../../compare $(OLIB)