--- Python-3.8.1/Lib/pathlib.py.orig	2019-12-18 18:21:23.000000000 +0100
+++ Python-3.8.1/Lib/pathlib.py	2019-12-23 11:17:46.731915100 +0100
@@ -122,6 +122,8 @@
 
     sep = '\\'
     altsep = '/'
+    if 'MSYSTEM' in os.environ:
+        sep, altsep = altsep, sep
     has_drv = True
     pathmod = ntpath