diff -Nru hedgewars-1.0.0/debian/changelog hedgewars-1.0.0/debian/changelog
--- hedgewars-1.0.0/debian/changelog	2019-10-11 06:26:22.000000000 +0000
+++ hedgewars-1.0.0/debian/changelog	2019-11-24 13:14:55.000000000 +0000
@@ -1,3 +1,9 @@
+hedgewars (1.0.0-4+rpi1) bullseye-staging; urgency=medium
+
+  * Force use of C.UTF-8 locale, the build fails under some locales (e.g. POSIX).
+
+ -- Peter Michael Green <plugwash@raspbian.org>  Sun, 24 Nov 2019 13:14:55 +0000
+
 hedgewars (1.0.0-4) unstable; urgency=medium
 
   * drop mips64el build, it hangs. 64 bit archs should use fpc when available
diff -Nru hedgewars-1.0.0/debian/rules hedgewars-1.0.0/debian/rules
--- hedgewars-1.0.0/debian/rules	2019-10-10 11:17:20.000000000 +0000
+++ hedgewars-1.0.0/debian/rules	2019-11-24 13:14:43.000000000 +0000
@@ -1,5 +1,7 @@
 #!/usr/bin/make -f
 
+export LC_ALL=C.UTF-8
+
 %:
 	dh $@