diff --git a/xCAT-server/lib/xcat/plugins/mknb.pm b/xCAT-server/lib/xcat/plugins/mknb.pm
index f9c3316ba..e4cd41283 100644
--- a/xCAT-server/lib/xcat/plugins/mknb.pm
+++ b/xCAT-server/lib/xcat/plugins/mknb.pm
@@ -78,6 +78,9 @@ sub process_request {
       $callback->({error=>["Failed to create a temporary directory"],errorcode=>[1]});
       return;
    }
+   unless (-e "$tftpdir/xcat") {
+       mkpath("$tftpdir/xcat");
+   }
    my $rc;
    my $invisibletouch=0;
    if (-e  "$::XCATROOT/share/xcat/netboot/genesis/$arch") {
diff --git a/xCAT-server/sbin/xcatconfig b/xCAT-server/sbin/xcatconfig
index 111cf5497..088388a3b 100755
--- a/xCAT-server/sbin/xcatconfig
+++ b/xCAT-server/sbin/xcatconfig
@@ -1873,6 +1873,9 @@ sub mknb
     # the xCAT-genesis-base.spec file touches /etc/xcat/genesis-base-updated, 
     # so we know to run mknb here.
     my $cmd;
+    if ($::arch =~ /ppc/) {
+        $::arch = "ppc64";
+    }
     if ((($::arch eq "x86_64") ||($::arch =~ /ppc/)) && (-f '/etc/xcat/genesis-scripts-updated') ) {
       unlink '/etc/xcat/genesis-scripts-updated';
       # Do not print messages or run command twice
@@ -1888,7 +1891,7 @@ sub mknb
         $cmd = "$::XCATROOT/sbin/mknb $::arch";
         xCAT::MsgUtils->message('I', "Running '$cmd', triggered by the installation/update of xCAT-genesis-base-$::arch ...");
     }
-    #my $outref = xCAT::Utils->runcmd("$cmd", 0);
+    my $outref = xCAT::Utils->runcmd("$cmd", 0);
     if ($cmd) {
         system($cmd);
         if ($? != 0) {
diff --git a/xCAT/debian/control b/xCAT/debian/control
index 069be17d8..31c38c62d 100644
--- a/xCAT/debian/control
+++ b/xCAT/debian/control
@@ -7,6 +7,6 @@ Standards-Version: 3.7.2
 
 Package: xcat
 Architecture: amd64 ppc64el
-Depends: ${perl:Depends}, xcat-server, xcat-client, libdbd-sqlite3-perl, isc-dhcp-server, apache2, nfs-kernel-server, nmap, bind9, libxml-parser-perl, xinetd, tftpd-hpa, tftp-hpa, conserver-xcat, libnet-telnet-perl, ipmitool-xcat (>=1.8.9), syslinux[any-amd64], libsys-virt-perl, syslinux-xcat[any-amd64], xnba-undi[any-amd64], xcat-genesis-scripts-amd64[any-amd64], elilo-xcat[any-amd64]
+Depends: ${perl:Depends}, xcat-server, xcat-client, libdbd-sqlite3-perl, isc-dhcp-server, apache2, nfs-kernel-server, nmap, bind9, libxml-parser-perl, xinetd, tftpd-hpa, tftp-hpa, conserver-xcat, libnet-telnet-perl, ipmitool-xcat (>=1.8.9), syslinux[any-amd64], libsys-virt-perl, syslinux-xcat[any-amd64], xnba-undi[any-amd64], xcat-genesis-scripts, elilo-xcat[any-amd64]
 Description: Server and configuration utilities of the xCAT management project
  xcat-server provides the core server and configuration management components of xCAT.  This package should be installed on your management server