diff --git a/builders/windows-builder.py b/builders/windows-builder.py
index fbc658c..7fc4a07 100644
--- a/builders/windows-builder.py
+++ b/builders/windows-builder.py
@@ -216,8 +216,9 @@ class WindowsBuilder(Builder):
         self._print_verbose('... Building PortableApps Installer')
         self._run_command([self.portableinstaller_exe, self.portable_dest_path],
                           'Error running PortableApps Installer')
-        portable_exe_name = 'OpenLPPortable_%s.paf.exe' % self.portable_version
+        portable_exe_name = 'OpenLPPortable_{ver}-{arch}.paf.exe'.format(ver=self.portable_version, arch=self.arch)
         portable_exe_path = os.path.abspath(os.path.join(self.portable_dest_path, '..', portable_exe_name))
+        self._print(self._run_command(['dir', os.path.abspath(os.path.join(self.portable_dest_path, '..'))]))
         self._print_verbose('... Portable Build: {}'.format(portable_exe_path))
         if os.path.exists(portable_exe_path):
             move(portable_exe_path, os.path.join(self.dist_path, '..', portable_exe_name))