--- doc/documentation/code/api/Makefile.in.orig	Wed Aug  2 11:42:11 2006
+++ doc/documentation/code/api/Makefile.in	Wed Aug  2 11:42:25 2006
@@ -400,7 +400,7 @@
 	doxygen $(srcdir)/dirac_api.doxygen
 
 install-data-hook:
-	cp -dR html/* $(DESTDIR)$(htmldir)
+	cp -R html/* $(DESTDIR)$(htmldir)
 # Tell versions [3.59,3.63) of GNU make to not export all variables.
 # Otherwise a system limit (for SysV at least) may be exceeded.
 .NOEXPORT: