From c632c823cee268c3efdd5251375434c976827370 Mon Sep 17 00:00:00 2001
From: John Ericson <John.Ericson@Obsidian.Systems>
Date: Thu, 28 Aug 2025 13:44:39 -0400
Subject: [PATCH] Take `DerivationBuilder::pid` private

---
 src/libstore/include/nix/store/build/derivation-builder.hh | 5 -----
 src/libstore/unix/build/derivation-builder.cc              | 5 +++++
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/libstore/include/nix/store/build/derivation-builder.hh b/src/libstore/include/nix/store/build/derivation-builder.hh
index 3e8903e8a..d7f2058d1 100644
--- a/src/libstore/include/nix/store/build/derivation-builder.hh
+++ b/src/libstore/include/nix/store/build/derivation-builder.hh
@@ -150,11 +150,6 @@ struct DerivationBuilderCallbacks
  */
 struct DerivationBuilder : RestrictionContext
 {
-    /**
-     * The process ID of the builder.
-     */
-    Pid pid;
-
     DerivationBuilder() = default;
     virtual ~DerivationBuilder() = default;
 
diff --git a/src/libstore/unix/build/derivation-builder.cc b/src/libstore/unix/build/derivation-builder.cc
index dff7d0eaa..b11eb383d 100644
--- a/src/libstore/unix/build/derivation-builder.cc
+++ b/src/libstore/unix/build/derivation-builder.cc
@@ -70,6 +70,11 @@ class DerivationBuilderImpl : public DerivationBuilder, public DerivationBuilder
 {
 protected:
 
+    /**
+     * The process ID of the builder.
+     */
+    Pid pid;
+
     LocalStore & store;
 
     std::unique_ptr<DerivationBuilderCallbacks> miscMethods;