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-rw-r--r--third_party/nix/src/libstore/store-api.hh3
1 files changed, 3 insertions, 0 deletions
diff --git a/third_party/nix/src/libstore/store-api.hh b/third_party/nix/src/libstore/store-api.hh
index 974734dc15..8d9c6f0861 100644
--- a/third_party/nix/src/libstore/store-api.hh
+++ b/third_party/nix/src/libstore/store-api.hh
@@ -235,6 +235,9 @@ struct BuildResult {
   // Convert the status of this `BuildResult` to its corresponding
   // `nix::proto::BuildStatus`
   nix::proto::BuildStatus status_to_proto();
+
+  static std::optional<BuildResult> FromProto(
+      const nix::proto::BuildDerivationResponse& resp);
 };
 
 class Store : public std::enable_shared_from_this<Store>, public Config {