From f08af20cd5cd2dbbb50e4472bf1a5d8ed1b73c21 Mon Sep 17 00:00:00 2001
From: Agent Zuse <steffen@beyer.io>
Date: Tue, 2 Jun 2026 00:01:40 +0200
Subject: [PATCH] dev: add en_GB locale archive to devenv

Provide a Nix glibc locale archive with en_GB.UTF-8 so tools inside the devenv shell inherit a valid UTF-8 locale.
---
 devenv.nix | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/devenv.nix b/devenv.nix
index d0ca9ea..0cb5c91 100644
--- a/devenv.nix
+++ b/devenv.nix
@@ -2,8 +2,18 @@
   pkgs,
   lib,
   ...
-}: {
+}: let
+  devLocales = pkgs.glibcLocales.override {
+    allLocales = false;
+    locales = [
+      "en_GB.UTF-8/UTF-8"
+      "en_US.UTF-8/UTF-8"
+    ];
+  };
+in {
   env = {
+    LANG = "en_GB.UTF-8";
+    LOCALE_ARCHIVE = "${devLocales}/lib/locale/locale-archive";
     MIX_OS_DEPS_COMPILE_PARTITION_COUNT = 8;
     NODE_ENV = "development";
     # Delay npm dependency resolution to reduce rushed supply-chain updates.