diff --git a/perl-xCAT/xCAT/Client.pm b/perl-xCAT/xCAT/Client.pm
index c98241e03..2a2cbaef8 100644
--- a/perl-xCAT/xCAT/Client.pm
+++ b/perl-xCAT/xCAT/Client.pm
@@ -9,10 +9,7 @@ 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));
 }
 
 my $inet6support;
diff --git a/perl-xCAT/xCAT/FSPUtils.pm b/perl-xCAT/xCAT/FSPUtils.pm
index 4ef9ea454..db4704812 100644
--- a/perl-xCAT/xCAT/FSPUtils.pm
+++ b/perl-xCAT/xCAT/FSPUtils.pm
@@ -10,10 +10,7 @@ BEGIN
 # if AIX - make sure we include perl 5.8.2 in INC path.
 #       Needed to find perl dependencies shipped in deps tarball.
 if ($^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/perl-xCAT/xCAT/InstUtils.pm b/perl-xCAT/xCAT/InstUtils.pm
index 300d13536..018bfe6d8 100644
--- a/perl-xCAT/xCAT/InstUtils.pm
+++ b/perl-xCAT/xCAT/InstUtils.pm
@@ -9,12 +9,8 @@ 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/perl-xCAT/xCAT/MsgUtils.pm b/perl-xCAT/xCAT/MsgUtils.pm
index 987de91aa..b612799ce 100644
--- a/perl-xCAT/xCAT/MsgUtils.pm
+++ b/perl-xCAT/xCAT/MsgUtils.pm
@@ -5,12 +5,8 @@ package xCAT::MsgUtils;
 
 # 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 strict;
diff --git a/perl-xCAT/xCAT/NetworkUtils.pm b/perl-xCAT/xCAT/NetworkUtils.pm
index 405f6efbe..cd4e0822d 100755
--- a/perl-xCAT/xCAT/NetworkUtils.pm
+++ b/perl-xCAT/xCAT/NetworkUtils.pm
@@ -10,10 +10,7 @@ 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 "$::XCATROOT/lib/perl";
diff --git a/perl-xCAT/xCAT/Table.pm b/perl-xCAT/xCAT/Table.pm
index ba51b3c35..c8b22718d 100644
--- a/perl-xCAT/xCAT/Table.pm
+++ b/perl-xCAT/xCAT/Table.pm
@@ -51,10 +51,7 @@ BEGIN
 # if AIX - make sure we include perl 5.8.2 in INC path.
 #       Needed to find perl dependencies shipped in deps tarball.
 if ($^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 "$::XCATROOT/lib/perl";
diff --git a/perl-xCAT/xCAT/Utils.pm b/perl-xCAT/xCAT/Utils.pm
index f3e0fbe85..0fa8d9ca6 100644
--- a/perl-xCAT/xCAT/Utils.pm
+++ b/perl-xCAT/xCAT/Utils.pm
@@ -10,10 +10,7 @@ BEGIN
 # if AIX - make sure we include perl 5.8.2 in INC path.
 #       Needed to find perl dependencies shipped in deps tarball.
 if ($^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 "$::XCATROOT/lib/perl";
diff --git a/perl-xCAT/xCAT/Version.pm b/perl-xCAT/xCAT/Version.pm
index e492a384f..787f4139c 100644
--- a/perl-xCAT/xCAT/Version.pm
+++ b/perl-xCAT/xCAT/Version.pm
@@ -10,10 +10,7 @@ BEGIN
 # if AIX - make sure we include perl 5.8.2 in INC path.
 #       Needed to find perl dependencies shipped in deps tarball.
 if ($^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";