From 10115578745b704fa9905a3d6799e0ed8dbbb356 Mon Sep 17 00:00:00 2001
From: tegwick <bernd.worsch@gmail.com>
Date: Thu, 30 Apr 2026 22:38:17 +0200
Subject: [PATCH] fix(build): configureFlags is a list, use ++ not + for -O0
 flag

---
 flake.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/flake.nix b/flake.nix
index fda7173..308e5b6 100644
--- a/flake.nix
+++ b/flake.nix
@@ -113,7 +113,7 @@
                                            # interface-file overflow in GHC 9.10.3) into two halves.
                                            # All awk/printf: no external file deps, no git-tracking required.
                                            # -O0 keeps .hi files small (strips unfoldings/specialisations).
-                                           configureFlags = (old.configureFlags or "") + " --ghc-option=-O0";
+                                           configureFlags = (old.configureFlags or []) ++ [ "--ghc-option=-O0" ];
                                            postUnpack = (old.postUnpack or "") + ''
                                                _types="$sourceRoot/build/Generated/Types.hs"