diff --git a/xCAT-server-2.0/lib/xcat/plugins/mknb.pm b/xCAT-server-2.0/lib/xcat/plugins/mknb.pm
index ee9c02be6..07c594230 100644
--- a/xCAT-server-2.0/lib/xcat/plugins/mknb.pm
+++ b/xCAT-server-2.0/lib/xcat/plugins/mknb.pm
@@ -3,7 +3,6 @@ use File::Temp qw(tempdir);
 use xCAT::Utils;
 use File::Path;
 use File::Copy;
-use Data::Dumper;
 
 sub handled_commands {
    return { 
@@ -42,7 +41,7 @@ sub process_request {
    my $installdir = "/install";
    my $tftpdir = "/tftpboot";
    if (scalar(@{$request->{arg}}) != 1) {
-      $callback->({error=>Dumper($request)." Need to specifiy architecture (x86_64 or ppc64)"},{errorcode=>[1]});
+      $callback->({error=>"Need to specifiy architecture (x86_64 or ppc64)"},{errorcode=>[1]});
       return;
    }
    my $arch = $request->{arg}->[0];
diff --git a/xCAT-server-2.0/xCAT-server.spec b/xCAT-server-2.0/xCAT-server.spec
index c45079965..ff0e517f8 100644
--- a/xCAT-server-2.0/xCAT-server.spec
+++ b/xCAT-server-2.0/xCAT-server.spec
@@ -50,7 +50,7 @@ cp -hpR share/xcat/install/* $RPM_BUILD_ROOT/%{prefix}/share/xcat/install/
 cp -hpR share/xcat/netboot/* $RPM_BUILD_ROOT/%{prefix}/share/xcat/netboot/
 %endif
 
-cp sbin/* $RPM_BUILD_ROOT/%{prefix}/sbin
+cp -d sbin/* $RPM_BUILD_ROOT/%{prefix}/sbin
 chmod 755 $RPM_BUILD_ROOT/%{prefix}/sbin/*
 
 cp share/xcat/ca/* $RPM_BUILD_ROOT/%{prefix}/share/xcat/ca