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-rw-r--r--src/nix/add-to-store.cc2
1 files changed, 1 insertions, 1 deletions
diff --git a/src/nix/add-to-store.cc b/src/nix/add-to-store.cc
index d0003790d3b9..e86b96e3f3f2 100644
--- a/src/nix/add-to-store.cc
+++ b/src/nix/add-to-store.cc
@@ -8,7 +8,7 @@ using namespace nix;
 struct CmdAddToStore : MixDryRun, StoreCommand
 {
     Path path;
-    std::experimental::optional<std::string> namePart;
+    std::optional<std::string> namePart;
 
     CmdAddToStore()
     {