diff --git a/documentation/README.darwin b/documentation/README.darwin
index 9c4e16e7e..f6d77c707 100644
--- a/documentation/README.darwin
+++ b/documentation/README.darwin
@@ -5,7 +5,10 @@ $Id$
 
 EPICS Base
 ==========
-1) As distributed, EPICS on Mac OS X uses the default command line input
+1) To build base set the HOST_ARCH environment variable to darwin-ppc
+   and run make in the top-level source directory.
+
+2) As distributed, EPICS on Mac OS X uses the default command line input
    routines.  IOC applications are much more pleasant to interact with if
    either the readline or libtecla input libraries is used.  The easiest
    way to get either or both of these libraries on to your system is to
@@ -13,7 +16,7 @@ EPICS Base
    found at:
         http://fink.sourceforge.net/
 
-2) If broadcasts are not seen locally, try adding "localhost" (127.0.0.1)
+3) If broadcasts are not seen locally, try adding "localhost" (127.0.0.1)
    to the EPICS_CA_ADDR_LIST.
 
 EPICS Extensions