diff --git a/support/nix/redis.nix b/support/nix/redis.nix
index eeb83bafab..5d8ab5051f 100644
--- a/support/nix/redis.nix
+++ b/support/nix/redis.nix
@@ -1,14 +1,13 @@
 with import <nixpkgs> {};
 
 mkShell {
-  buildInputs = [ redis glibcLocales ];
+  buildInputs = [ redis ];
 
   shellHook = ''
     ${builtins.readFile ./pushtrap.sh}
 
-    LOCALE_ARCHIVE = "${glibcLocales}/lib/locale/locale-archive"
-    LANG = "en_US.UTF-8"
-    LC_ALL = "en_US.UTF-8"
+    LANG=C
+    LC_ALL=C
 
     TMP=$(mktemp -d)
     SOCKET=$TMP/redis.sock