From df5c650e3fea41787b0f94b8e84d58641851eefe Mon Sep 17 00:00:00 2001
From: Stefan Frijters <sfrijters@gmail.com>
Date: Mon, 15 Dec 2025 11:58:06 +0100
Subject: [PATCH] boost: fix patches for 1.87.0 with structuredAttrs

This properly flattens the patches array again -
otherwise all patches are dropped when structuredAttrs are enabled.

The build will finish, but downstream users of the library will
not be able to link to it properly (e.g. folly).
---
 pkgs/development/libraries/boost/generic.nix | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/boost/generic.nix b/pkgs/development/libraries/boost/generic.nix
index baa3ee8353a7..2684e429b472 100644
--- a/pkgs/development/libraries/boost/generic.nix
+++ b/pkgs/development/libraries/boost/generic.nix
@@ -226,7 +226,7 @@ stdenv.mkDerivation {
         hash = "sha256-0IHK55JSujYcwEVOuLkwOa/iPEkdAKQlwVWR42p/X2U=";
       })
     ]
-    ++ lib.optional (version == "1.87.0") [
+    ++ lib.optionals (version == "1.87.0") [
       # Fix operator<< for shared_ptr and intrusive_ptr
       # https://github.com/boostorg/smart_ptr/issues/115
       (fetchpatch {
@@ -402,4 +402,6 @@ stdenv.mkDerivation {
     "dev"
   ];
   setOutputFlags = false;
+
+  __structuredAttrs = true;
 }