1 files changed, 2 insertions, 2 deletions
diff --git a/third_party/nix/src/nix/command.hh b/third_party/nix/src/nix/command.hh
index 813fdb557d82..f7eaeb721620 100644
--- a/third_party/nix/src/nix/command.hh
+++ b/third_party/nix/src/nix/command.hh
@@ -1,5 +1,6 @@
 #pragma once
 
+#include <memory>
 #include "libexpr/common-eval-args.hh"
 #include "libutil/args.hh"
 
@@ -80,8 +81,7 @@ struct SourceExprCommand : virtual Args, StoreCommand, MixEvalArgs {
 
  private:
   std::shared_ptr<EvalState> evalState;
-
-  Value* vSourceExpr = 0;
+  std::shared_ptr<Value> vSourceExpr;
 };
 
 enum RealiseMode { Build, NoBuild, DryRun };