--- a/setup.py	Sun Mar 29 01:57:17 2020 +0900
+++ b/setup.py	Thu Apr 02 21:58:10 2020 +0530
@@ -267,7 +267,7 @@
         if err or returncode != 0:
             printf("stderr from '%s':" % (' '.join(cmd)), file=sys.stderr)
             printf(err, file=sys.stderr)
-            return ''
+            return b''
         return out