diff -ura electrum-mona/setup.py electrum-mona-3.1.1.new/setup.py
--- electrum-mona.orig/setup.py	2018-03-14 01:36:16.000000000 +0900
+++ electrum-mona.new/setup.py	2018-03-18 17:45:21.165390904 +0900
@@ -86,8 +86,3 @@
     url="https://github.com/wakiyamap/electrum-mona",
     long_description="""Lightweight Monacoin Wallet"""
 )
-
-# Optional modules (not required to run Electrum)
-import pip
-opt_modules = requirements_hw + ['pycryptodomex']
-[ pip.main(['install', m]) for m in opt_modules ]