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-rw-r--r--third_party/nix/src/libstore/derivations.hh2
1 files changed, 1 insertions, 1 deletions
diff --git a/third_party/nix/src/libstore/derivations.hh b/third_party/nix/src/libstore/derivations.hh
index dfdebdd01e..cbfea20503 100644
--- a/third_party/nix/src/libstore/derivations.hh
+++ b/third_party/nix/src/libstore/derivations.hh
@@ -44,7 +44,7 @@ using DerivationOutputs = absl::btree_map<std::string, DerivationOutput>;
    output IDs we are interested in. */
 using DerivationInputs = absl::btree_map<Path, StringSet>;
 
-using StringPairs = std::map<std::string, std::string>;
+using StringPairs = absl::btree_map<std::string, std::string>;
 
 struct BasicDerivation {
   DerivationOutputs outputs; /* keyed on symbolic IDs */