From 80c545bcdcdf1dedcb31540d7b9a9d786dd57f5d Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Wed, 26 Nov 2025 18:43:32 -0500
Subject: [PATCH] Fix include errors masked by precompiled headers

---
 src/libutil/include/nix/util/config-impl.hh | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libutil/include/nix/util/config-impl.hh b/src/libutil/include/nix/util/config-impl.hh
index 6066765c5..8f6f9a358 100644
--- a/src/libutil/include/nix/util/config-impl.hh
+++ b/src/libutil/include/nix/util/config-impl.hh
@@ -16,6 +16,7 @@
 #include "nix/util/configuration.hh"
 #include "nix/util/args.hh"
 #include "nix/util/logging.hh"
+#include "nix/util/file-path.hh"
 
 namespace nix {
 
@@ -135,6 +136,7 @@ DECLARE_CONFIG_SERIALISER(StringSet)
 DECLARE_CONFIG_SERIALISER(StringMap)
 DECLARE_CONFIG_SERIALISER(std::set<ExperimentalFeature>)
 DECLARE_CONFIG_SERIALISER(std::filesystem::path)
+DECLARE_CONFIG_SERIALISER(std::optional<std::filesystem::path>)
 
 template<typename T>
 T BaseSetting<T>::parse(const std::string & str) const