diff --git a/ee/cli/plugins/stack.py b/ee/cli/plugins/stack.py
index 54a6fbb6..b694d3fb 100644
--- a/ee/cli/plugins/stack.py
+++ b/ee/cli/plugins/stack.py
@@ -88,6 +88,11 @@ class EEStackController(CementBaseController):
 
         if set(EEVariables.ee_mysql).issubset(set(apt_packages)):
             Log.info(self, "Adding repository for MySQL, please wait ...")
+            mysql_pref = ("Package: *\nPin: origin mirror.aarnet.edu.au"
+                          "\nPin-Priority: 1000\n")
+            with open('/etc/apt/preferences.d/'
+                      'MariaDB.pref', 'w') as mysql_pref_file:
+                mysql_pref_file.write(mysql_pref)
             EERepo.add(self, repo_url=EEVariables.ee_mysql_repo)
             Log.debug(self, 'Adding key for {0}'
                       .format(EEVariables.ee_mysql_repo))
diff --git a/ee/cli/plugins/stack_migrate.py b/ee/cli/plugins/stack_migrate.py
index 2533aa76..23255973 100644
--- a/ee/cli/plugins/stack_migrate.py
+++ b/ee/cli/plugins/stack_migrate.py
@@ -31,6 +31,13 @@ class EEStackMigrateController(CementBaseController):
 
         # Add MariaDB repo
         Log.info(self, "Adding repository for MariaDB, please wait ...")
+
+        mysql_pref = ("Package: *\nPin: origin mirror.aarnet.edu.au"
+                      "\nPin-Priority: 1000\n")
+        with open('/etc/apt/preferences.d/'
+                  'MariaDB.pref', 'w') as mysql_pref_file:
+            mysql_pref_file.write(mysql_pref)
+
         EERepo.add(self, repo_url=EEVariables.ee_mysql_repo)
         Log.debug(self, 'Adding key for {0}'
                   .format(EEVariables.ee_mysql_repo))
@@ -72,6 +79,7 @@ class EEStackMigrateController(CementBaseController):
         Log.info(self, "Updating apt-cache, please wait ...")
         EEAptGet.update(self)
         Log.info(self, "Installing MariaDB, please wait ...")
+        EEAptGet.remove(self, ["libmysqlclient18"])
         EEAptGet.install(self, apt_packages)
         EEAptGet.auto_remove(self)
 
diff --git a/ee/core/aptget.py b/ee/core/aptget.py
index e23674fb..fd64a7c9 100644
--- a/ee/core/aptget.py
+++ b/ee/core/aptget.py
@@ -59,7 +59,7 @@ class EEAptGet():
         global apt_get
         apt_get = apt_get.bake("-y")
         try:
-            if purge == "True":
+            if purge:
                 for line in apt_get.purge(*packages, _iter=True):
                     Log.info(self, Log.ENDC+line+Log.OKBLUE, end=' ')
             else: