--- ./diffoscope/environ.py.orig	2022-09-23 10:04:51.000000000 +0200
+++ ./diffoscope/environ.py	2022-09-27 17:22:36.000000000 +0200
@@ -54,6 +54,6 @@
         os.environ[x] = "C"
 
     os.environ["TZ"] = "UTC"
-    os.environ["LC_CTYPE"] = "C.UTF-8"
+    os.environ["LC_CTYPE"] = "UTF-8"
 
     time.tzset()