From cec6862940c2deb71b599536dc31c5d10a43b5d6 Mon Sep 17 00:00:00 2001
From: Nick Cao <nickcao@nichi.co>
Date: Sat, 24 Sep 2022 23:14:43 +0800
Subject: [PATCH] qt6.qtdeclarative: reduce closure size by removing reference
 to qtbase.dev

before: /nix/store/g7k03425nzhlwcldc85fyw4bly7bwk9a-qtdeclarative-6.3.2    1.7G
after:  /nix/store/x08j7c378j6a8i1vam4iqgk4lk6sqzm0-qtdeclarative-6.3.2  566.7M
---
 pkgs/development/libraries/qt-6/modules/qtdeclarative.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/libraries/qt-6/modules/qtdeclarative.nix b/pkgs/development/libraries/qt-6/modules/qtdeclarative.nix
index b76baea49930..c8abc71a2235 100644
--- a/pkgs/development/libraries/qt-6/modules/qtdeclarative.nix
+++ b/pkgs/development/libraries/qt-6/modules/qtdeclarative.nix
@@ -32,4 +32,8 @@ qtModule {
     "bin/qmlscene"
     "bin/qmltestrunner"
   ];
+
+  NIX_CFLAGS_COMPILE = [
+    "-fmacro-prefix-map=${qtbase.dev}=qtbase.dev"
+  ];
 }