From 33d031095fa5ab4dfcbd9e4627f23b999119863b Mon Sep 17 00:00:00 2001
From: Sergei Zimmerman <sergei@zimmerman.foo>
Date: Sun, 20 Jul 2025 21:24:46 +0300
Subject: [PATCH] libstore: Speed up builds by using precompiled headers

---
 src/libstore/meson.build                | 1 +
 src/libstore/pch/precompiled-headers.hh | 8 ++++++++
 2 files changed, 9 insertions(+)
 create mode 100644 src/libstore/pch/precompiled-headers.hh

diff --git a/src/libstore/meson.build b/src/libstore/meson.build
index d82bcddc1..375959643 100644
--- a/src/libstore/meson.build
+++ b/src/libstore/meson.build
@@ -348,6 +348,7 @@ this_library = library(
   link_args: linker_export_flags,
   prelink : true, # For C++ static initializers
   install : true,
+  cpp_pch : ['pch/precompiled-headers.hh']
 )
 
 install_headers(headers, subdir : 'nix/store', preserve_path : true)
diff --git a/src/libstore/pch/precompiled-headers.hh b/src/libstore/pch/precompiled-headers.hh
new file mode 100644
index 000000000..ea0dd5d70
--- /dev/null
+++ b/src/libstore/pch/precompiled-headers.hh
@@ -0,0 +1,8 @@
+#include "nix/store/store-api.hh"
+#include "nix/store/realisation.hh"
+#include "nix/store/derived-path.hh"
+#include "nix/store/derivations.hh"
+#include "nix/store/local-store.hh"
+#include "nix/util/util.hh"
+
+#include <nlohmann/json.hpp>