From a4984c95280507c632f70ae6b82f86b14b20485d Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Tue, 9 Dec 2025 00:13:31 +0100
Subject: [PATCH] hercules-ci-agent: Work around #461651 on Darwin

---
 .../haskell-modules/configuration-darwin.nix         | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/pkgs/development/haskell-modules/configuration-darwin.nix b/pkgs/development/haskell-modules/configuration-darwin.nix
index 9569f4b36597..d394e8d9c7ec 100644
--- a/pkgs/development/haskell-modules/configuration-darwin.nix
+++ b/pkgs/development/haskell-modules/configuration-darwin.nix
@@ -323,6 +323,18 @@ self: super:
       '';
     }) super.di-core;
 
+    # Template Haskell on Darwin fails to load an available symbol in these
+    # transitive dependencies since GHC 9.10.3.
+    # See issue https://github.com/NixOS/nixpkgs/issues/461651
+    hercules-ci-agent = overrideCabal (old: {
+      preBuild = ''
+        DYLD_INSERT_LIBRARIES="''${DYLD_INSERT_LIBRARIES:+$DYLD_INSERT_LIBRARIES:}$(pkg-config --variable=libdir nix-store)/libnixstore.dylib:$(pkg-config --variable=libdir nix-util)/libnixutil.dylib"
+        export DYLD_INSERT_LIBRARIES
+        echo "DYLD_INSERT_LIBRARIES=$DYLD_INSERT_LIBRARIES"
+      ''
+      + (old.preBuild or "");
+    }) super.hercules-ci-agent;
+
     # Require /usr/bin/security which breaks sandbox
     http-reverse-proxy = dontCheck super.http-reverse-proxy;
     servant-auth-server = dontCheck super.servant-auth-server;