diff --git a/loaih/__init__.py b/loaih/__init__.py
index 0792e7d..795b6df 100644
--- a/loaih/__init__.py
+++ b/loaih/__init__.py
@@ -43,10 +43,7 @@ class Build(object):
 
     def check(self, storage_path):
         """Checking if the requested AppImage has been already built."""
-        self.storage_path = storage_path
-        
-        if self.portable:
-            self.storage_path += "/portable"
+        self.storage_path = storage_path + ('/portable' if self.portable else '')
 
         for arch in self.arch:
             res = subprocess.check_output("find {path} -name '{appimage}'".format(
@@ -187,7 +184,7 @@ class Build(object):
         # Building app
         if self.updatable:
             zsync = self.appimagefilename[arch] + '.zsync'
-            subprocess.run("VERSION={version} ./appimagetool -u 'zsync|{zsync}' -v ./{appname}.AppDir/".format(version = appversion, zsync = zsync, appname = self.__appname__), shell=True)
+            subprocess.run("VERSION={version} ./appimagetool -u 'zsync|{zsync}' -v ./{appname}.AppDir/".format(version = appversion, zsync = self.appimagefilename[arch] + '.zsync', appname = self.appname), shell=True)
 
         else:
             subprocess.run("VERSION={version} ./appimagetool -v ./{appname}.AppDir/".format(version = appversion, appname = self.appname), shell=True)