diff --git a/wo/cli/plugins/stack.py b/wo/cli/plugins/stack.py
index 24aa932..adeb28e 100644
--- a/wo/cli/plugins/stack.py
+++ b/wo/cli/plugins/stack.py
@@ -1561,7 +1561,7 @@ class WOStackController(CementBaseController):
                     packages = packages + [["https://github.com/"
                                             "erikdubbelboer/"
                                             "phpRedisAdmin/archive"
-                                            "/ v1.11.3.tar.gz",
+                                            "/v1.11.3.tar.gz",
                                             "/var/lib/wo/tmp/pra.tar.gz",
                                             "phpRedisAdmin"]]
             # ADMINER
@@ -1654,19 +1654,23 @@ class WOStackController(CementBaseController):
             pass
 
         if (apt_packages) or (packages):
-            Log.debug(self, "Calling pre_pref")
-            self.pre_pref(apt_packages)
             if (apt_packages):
+                Log.debug(self, "Calling pre_pref")
+                self.pre_pref(apt_packages)
                 WOSwap.add(self)
                 Log.info(self, "Updating apt-cache, please wait...")
                 WOAptGet.update(self)
                 Log.info(self, "Installing packages, please wait...")
-                WOAptGet.install(self, apt_packages)
+                OAptGet.install(self, apt_packages)
+                Log.debug(self, "Calling post_pref")
+                self.post_pref(apt_packages)
+
             if (packages):
                 Log.debug(self, "Downloading following: {0}".format(packages))
                 WODownload.download(self, packages)
-            Log.debug(self, "Calling post_pref")
-            self.post_pref(apt_packages, packages)
+                Log.debug(self, "Calling post_pref")
+                self.post_pref(packages)
+
             if 'redis-server' in apt_packages:
                 # set redis.conf parameter
                 # set maxmemory 10% for ram below 512MB and 20% for others