diff --git a/class/core/system_api.py b/class/core/system_api.py
index bbe1b3af8..28ed0c283 100755
--- a/class/core/system_api.py
+++ b/class/core/system_api.py
@@ -689,12 +689,11 @@ class system_api:
 
                 dist_to = toPath + "/mdserver-web-" + version
                 if not os.path.exists(dist_to):
-                    mw.execShell('unzip -o ' + toPath +
-                                 '/mw.zip' + ' -d ' + toPath)
-
-                cmd_cp = "cp -rf " + toPath + '/mdserver-web-' + \
-                    version + "/* " + mw.getServerDir() + "/mdserver-web"
-                mw.execShell(cmd_cp)
+                    os.system('unzip -o ' + toPath +
+                              '/mw.zip' + ' -d ' + toPath)
+                    cmd_cp = 'cp -rf ' + toPath + '/mdserver-web-' + \
+                        version + '/* ' + mw.getServerDir() + '/mdserver-web'
+                    mw.execShell(cmd_cp)
 
                 mw.execShell('rm -rf ' + toPath + '/mdserver-web-' + version)
                 mw.execShell('rm -rf ' + toPath + '/mw.zip')