diff --git a/Makefile b/Makefile
index 41d84e4f841de8494990c83f0d0736df8747e95a..0b744ffce7d76829d5dadae4d0b4fe8626b4042f 100644
--- a/Makefile
+++ b/Makefile
@@ -20,9 +20,10 @@ install_:
 
 install_DDE: install_Dir
 	${MKDIR} ${INSTDIR}.Build
+	${MKDIR} ${INSTDIR}.Unix
 	${CP} Build.canonical  ${INSTDIR}.canonical     ${CPFLAGS}
 	${CP} Build.stripdepnd ${INSTDIR}.stripdepnd    ${CPFLAGS}
-	${CP} Unix.chmod       ${INSTDIR}.chmod         ${CPFLAGS}
+	${CP} Unix.chmod       ${INSTDIR}.Unix.chmod    ${CPFLAGS}
 	${CP} Unix.mkdir       ${INSTDIR}.mkdir         ${CPFLAGS}
 	${CP} Build.InstRes    ${INSTDIR}.Build.InstRes ${CPFLAGS}