diff -Nru hedgewars-1.0.0/debian/changelog hedgewars-1.0.0/debian/changelog
--- hedgewars-1.0.0/debian/changelog	2020-10-19 17:27:39.000000000 +0000
+++ hedgewars-1.0.0/debian/changelog	2020-10-26 16:04:26.000000000 +0000
@@ -1,3 +1,10 @@
+hedgewars (1.0.0-13+rpi1) bullseye-staging; urgency=medium
+
+  [changes brought forward from 1.0.0-4+rpi1 by Peter Michael Green <plugwash@raspbian.org> at Sun, 24 Nov 2019 13:14:55 +0000]
+  * Force use of C.UTF-8 locale, the build fails under some locales (e.g. POSIX).
+
+ -- Raspbian forward porter <root@raspbian.org>  Mon, 26 Oct 2020 16:04:26 +0000
+
 hedgewars (1.0.0-13) unstable; urgency=medium
 
   * Use clang 10 to build where fpc is not available, because clang-11 doesn't
diff -Nru hedgewars-1.0.0/debian/rules hedgewars-1.0.0/debian/rules
--- hedgewars-1.0.0/debian/rules	2020-10-16 08:53:16.000000000 +0000
+++ hedgewars-1.0.0/debian/rules	2020-10-26 16:04:26.000000000 +0000
@@ -1,5 +1,7 @@
 #!/usr/bin/make -f
 
+export LC_ALL=C.UTF-8
+
 %:
 	dh $@