diff --git a/xCAT/postscripts/db2install b/xCAT/postscripts/db2install
index f505638ff..85cd3f397 100755
--- a/xCAT/postscripts/db2install
+++ b/xCAT/postscripts/db2install
@@ -34,12 +34,8 @@ BEGIN
 
 # if AIX - make sure we include perl 5.8.2 in INC path.
 #       Needed to find perl dependencies shipped in deps tarball.
-if ($^O =~ /^aix/i)
-{
-    use lib "/usr/opt/perl5/lib/5.8.2/aix-thread-multi";
-    use lib "/usr/opt/perl5/lib/5.8.2";
-    use lib "/usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi";
-    use lib "/usr/opt/perl5/lib/site_perl/5.8.2";
+if ($^O =~ /^aix/i) {
+	unshift(@INC, qw(/usr/opt/perl5/lib/5.8.2/aix-thread-multi /usr/opt/perl5/lib/5.8.2 /usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi /usr/opt/perl5/lib/site_perl/5.8.2));
 }
 
 use lib "$::XCATROOT/lib/perl";
diff --git a/xCAT/postscripts/odbcsetup b/xCAT/postscripts/odbcsetup
index 9a4fbc288..71ab5e501 100755
--- a/xCAT/postscripts/odbcsetup
+++ b/xCAT/postscripts/odbcsetup
@@ -23,12 +23,8 @@ BEGIN
 
 # if AIX - make sure we include perl 5.8.2 in INC path.
 #       Needed to find perl dependencies shipped in deps tarball.
-if ($^O =~ /^aix/i)
-{
-    use lib "/usr/opt/perl5/lib/5.8.2/aix-thread-multi";
-    use lib "/usr/opt/perl5/lib/5.8.2";
-    use lib "/usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi";
-    use lib "/usr/opt/perl5/lib/site_perl/5.8.2";
+if ($^O =~ /^aix/i) {
+	unshift(@INC, qw(/usr/opt/perl5/lib/5.8.2/aix-thread-multi /usr/opt/perl5/lib/5.8.2 /usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi /usr/opt/perl5/lib/site_perl/5.8.2));
 }
 
 use lib "$::XCATROOT/lib/perl";
diff --git a/xCAT/postscripts/servicenode b/xCAT/postscripts/servicenode
index 7530a5f32..a8e181d2c 100755
--- a/xCAT/postscripts/servicenode
+++ b/xCAT/postscripts/servicenode
@@ -40,10 +40,7 @@ BEGIN
 # if AIX - make sure we include perl 5.8.2 in INC path.
 #       Needed to find perl dependencies shipped in deps tarball.
 if ($^O =~ /^aix/i) {
-        use lib "/usr/opt/perl5/lib/5.8.2/aix-thread-multi";
-        use lib "/usr/opt/perl5/lib/5.8.2";
-        use lib "/usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi";
-        use lib "/usr/opt/perl5/lib/site_perl/5.8.2";
+	unshift(@INC, qw(/usr/opt/perl5/lib/5.8.2/aix-thread-multi /usr/opt/perl5/lib/5.8.2 /usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi /usr/opt/perl5/lib/site_perl/5.8.2));
 }
 
 use lib "$::XCATROOT/lib/perl";
diff --git a/xCAT/postscripts/xcataixpost b/xCAT/postscripts/xcataixpost
index a4f6e5f18..53a5ead06 100755
--- a/xCAT/postscripts/xcataixpost
+++ b/xCAT/postscripts/xcataixpost
@@ -15,11 +15,9 @@
 # if AIX - make sure we include perl 5.8.2 in INC path.
 #       Needed to find perl dependencies shipped in deps tarball.
 if ($^O =~ /^aix/i) {
-        use lib "/usr/opt/perl5/lib/5.8.2/aix-thread-multi";
-        use lib "/usr/opt/perl5/lib/5.8.2";
-        use lib "/usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi";
-        use lib "/usr/opt/perl5/lib/site_perl/5.8.2";
+	unshift(@INC, qw(/usr/opt/perl5/lib/5.8.2/aix-thread-multi /usr/opt/perl5/lib/5.8.2 /usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi /usr/opt/perl5/lib/site_perl/5.8.2));
 }
+
 use strict;
 use File::Path;
 use IO::Socket;
diff --git a/xCAT/postscripts/xcataixscript b/xCAT/postscripts/xcataixscript
index be1c4f01b..51951fe2b 100644
--- a/xCAT/postscripts/xcataixscript
+++ b/xCAT/postscripts/xcataixscript
@@ -9,10 +9,7 @@
 # if AIX - make sure we include perl 5.8.2 in INC path.
 #       Needed to find perl dependencies shipped in deps tarball.
 if ($^O =~ /^aix/i) {
-        use lib "/usr/opt/perl5/lib/5.8.2/aix-thread-multi";
-        use lib "/usr/opt/perl5/lib/5.8.2";
-        use lib "/usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi";
-        use lib "/usr/opt/perl5/lib/site_perl/5.8.2";
+	unshift(@INC, qw(/usr/opt/perl5/lib/5.8.2/aix-thread-multi /usr/opt/perl5/lib/5.8.2 /usr/opt/perl5/lib/site_perl/5.8.2/aix-thread-multi /usr/opt/perl5/lib/site_perl/5.8.2));
 }
 
 use File::Path;