--- rpl/README	2011/07/22 07:38:00	1.17
+++ rpl/README	2011/09/08 14:02:52	1.18
@@ -27,7 +27,9 @@ symbolic and scientific computations.
 	tools/file-*/Makefile.am;
 	- gcc-4.4 or newer;
 	- g++-4.4 or newer;
-	- gfortran-4.4 or newer.
+	- gfortran-4.4 or newer;
+	- bash in /bin/bash. To build RPL/CAS on NetBSD, you have to add a soft link
+	  like 'ln -s /usr/pkg/bin/bash /bin/bash'.
 
 	RPL/2 build process invoques automake and autoconf.