diff --git a/xnba/README b/xnba/README
index 9c109dc..dc39350 100644
--- a/xnba/README
+++ b/xnba/README
@@ -1,30 +1,39 @@
-xNBA
------
+Get latest ipxe source from git.ipxe.org
+----------------------------------------
 
-xnba-1.20.1.tar.bz2 contains the source code of ipxe version 1.20.1 (10/29/2020 ?)
+Current version is 1.20.1, the tar command below will use 1.20.1 to generate xnba-1.20.1.tar.bz2 the source code of ipxe version 1.20.1 (10/29/2020 ?)
 
-#git clone git://git.ipxe.org/ipxe.git
-#tar Jcvf xnba-1.20.1.tar.bz2 --exclude-vcs ipxe
+1. git clone git://git.ipxe.org/ipxe.git
+2. tar Jcvf xnba-<version>.tar.bz2 --exclude-vcs ipxe
 
-The following patches contain modification for xCAT Network Boot Agent
+Build xNBA rpm for xcat-dep
+---------------------------
+
+1. Clone xcat-dep/xnba and create a new branch
+2. Checkin the generated xnba-<version>.tar.bz2 file from above into git
+3. Modify patch files if needed and checkin into git. The patch files will automatically be applied during build step below.
+  The following patches contain modification for xCAT Network Boot Agent
 
 	ipxe-xnbaclass.patch
 	ipxe-machyp.patch
 	ipxe-dhcp.patch	
 	ipxe-branding.patch
 
-xNBA for linux
---------------
-Require packages:  xz-devel
-RPM build:  rpmbuild -ba xnba-undi.spec
+4. On x86 build machine, checkout the branch created above
+
+For linux
+---------
+1. On x86 RHEL machine, install required package:  xz-devel
+2. RPM build:  rpmbuild -ba xnba-undi.spec
+3. Copy generated rpm xnba-undi-<version>.noarch.rpm into /gsa/pokgsa/projects/x/xcat/build/linux/xcat-dep/
 
 
-xNBA for Debian
----------------
-Require packages:  dpkg-buildpackage, debhelper, and quilt
-
-./make_deb.sh: build the package from the binaries under "binary" directory
-./rebuild.sh : build the package from source code, this should only run on amd64/x86_64 platform, it will update the files under "binary" directory after compilation
+For Debian
+----------
+1. On x86 Ubuntu machine, install required packages:  dpkg-buildpackage, debhelper, and quilt
+2. ./make_deb.sh: build the package from the binaries under "binary" directory
+3. ./rebuild.sh : build the package from source code, this should only run on amd64/x86_64 platform, it will update the files under "binary" directory after compilation
+4. Copy generated deb xnba-undi_<version>_all.deb into /gsa/pokgsa/projects/x/xcat/build/ubuntu/xcat-dep/xcat-dep/pool/main/x/xnba-undi/