From 8bbc131cc0b9fb402cac14737ea87a31d2d4804d Mon Sep 17 00:00:00 2001
From: Lukas Werling <lukas@lwrl.de>
Date: Sun, 12 Jul 2026 21:54:53 +0200
Subject: [PATCH] discourse: Fix icu library mismatch in mini_racer

After #525241 ("nodejs: pin icu to newer version"), building discourse
assets would fail with a library loading error:

LoadError: /nix/store/3sv7vxglmc6zwg68ycl9xpny87mm6fp7-discourse-ruby-env-2026.1.4/lib/ruby/gems/3.3.0/extensions/x86_64-linux/3.3.0/mini_racer-0.19.1/mini_racer_extension.so: undefined symbol: _ZN6icu_788ByteSink15GetAppendBufferEiiPciPi (LoadError)

This error apparently occurs when the ICU version used by libv8 does not
match the ICU version mini_racer is built with.

Thanks to @0xB10C for identifying the problematic commit.

Fixes #538128
---
 pkgs/servers/web-apps/discourse/default.nix | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/pkgs/servers/web-apps/discourse/default.nix b/pkgs/servers/web-apps/discourse/default.nix
index 64d7f371ec5b..3125d926840d 100644
--- a/pkgs/servers/web-apps/discourse/default.nix
+++ b/pkgs/servers/web-apps/discourse/default.nix
@@ -34,7 +34,7 @@
   brotli,
   procps,
   rsync,
-  icu,
+  icu78,
   rustPlatform,
   buildRubyGem,
   rustc,
@@ -183,7 +183,7 @@ let
     gemset = import ./rubyEnv/gemset.nix;
     gemConfig = defaultGemConfig // {
       mini_racer = attrs: {
-        buildInputs = [ icu ];
+        buildInputs = [ icu78 ];
         dontBuild = false;
         NIX_LDFLAGS = "-licui18n";
       };