From abcceafbce41374b70ed090aeb0627ebdc26d3af Mon Sep 17 00:00:00 2001
From: Robert Hensing <robert@roberthensing.nl>
Date: Thu, 9 Oct 2025 21:23:26 +0200
Subject: [PATCH] Use const for lock in openEvalCache

---
 src/libflake/flake.cc                   | 2 +-
 src/libflake/include/nix/flake/flake.hh | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libflake/flake.cc b/src/libflake/flake.cc
index 26b3ef2a0..147bff820 100644
--- a/src/libflake/flake.cc
+++ b/src/libflake/flake.cc
@@ -954,7 +954,7 @@ std::optional<Fingerprint> LockedFlake::getFingerprint(ref<Store> store, const f
 
 Flake::~Flake() {}
 
-ref<eval_cache::EvalCache> openEvalCache(EvalState & state, ref<LockedFlake> lockedFlake)
+ref<eval_cache::EvalCache> openEvalCache(EvalState & state, ref<const LockedFlake> lockedFlake)
 {
     auto fingerprint = state.settings.useEvalCache && state.settings.pureEval
                            ? lockedFlake->getFingerprint(state.store, state.fetchSettings)
diff --git a/src/libflake/include/nix/flake/flake.hh b/src/libflake/include/nix/flake/flake.hh
index b3168144c..79a50f0f7 100644
--- a/src/libflake/include/nix/flake/flake.hh
+++ b/src/libflake/include/nix/flake/flake.hh
@@ -222,7 +222,7 @@ void callFlake(EvalState & state, const LockedFlake & lockedFlake, Value & v);
 /**
  * Open an evaluation cache for a flake.
  */
-ref<eval_cache::EvalCache> openEvalCache(EvalState & state, ref<LockedFlake> lockedFlake);
+ref<eval_cache::EvalCache> openEvalCache(EvalState & state, ref<const LockedFlake> lockedFlake);
 
 } // namespace flake