diff -r f5d62f4d5327 -r 66f6ca2b7aee setup.py
--- a/setup.py	Wed Nov 25 12:33:37 2020 +0100
+++ b/setup.py	Fri Nov 27 17:00:25 2020 -0500
@@ -816,8 +816,7 @@
                 if sys.version_info[0] >= 3:
                     fsdecode = os.fsdecode
                 dest = os.path.join(
-                    os.path.dirname(self.hgtarget),
-                    fsdecode(dllbasename),
+                    os.path.dirname(self.hgtarget), fsdecode(dllbasename),
                 )
 
                 if not os.path.exists(dest):