From 18440f37482abb37fde3b946815e94cba1f81b83 Mon Sep 17 00:00:00 2001
From: sternenseemann <sternenseemann@systemli.org>
Date: Mon, 10 Feb 2025 23:29:07 +0100
Subject: [PATCH] haskell.compiler.ghcjs810: set up EM_CACHE for emcc

The compiler function test now causes emcc to try and lock its
cache (which is located in the nix store unless we set EM_CACHE).

Resolves #376582.
---
 pkgs/development/compilers/ghcjs/8.10/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/development/compilers/ghcjs/8.10/default.nix b/pkgs/development/compilers/ghcjs/8.10/default.nix
index d3f74f52e86e..c46a84e87791 100644
--- a/pkgs/development/compilers/ghcjs/8.10/default.nix
+++ b/pkgs/development/compilers/ghcjs/8.10/default.nix
@@ -105,6 +105,9 @@ stdenv.mkDerivation {
     touch $HOME/.cabal/config
     cd lib/boot
 
+    export EM_CACHE="$HOME/.emscriptencache"
+    mkdir -p "$EM_CACHE"
+
     mkdir -p $out/bin
     mkdir -p $out/lib/${bootGhcjs.name}
     lndir ${bootGhcjs}/bin $out/bin