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-rw-r--r--src/libexpr/primops/fetchGit.cc4
1 files changed, 2 insertions, 2 deletions
diff --git a/src/libexpr/primops/fetchGit.cc b/src/libexpr/primops/fetchGit.cc
index b46d2f258265..aaf02c856d4f 100644
--- a/src/libexpr/primops/fetchGit.cc
+++ b/src/libexpr/primops/fetchGit.cc
@@ -26,7 +26,7 @@ struct GitInfo
 std::regex revRegex("^[0-9a-fA-F]{40}$");
 
 GitInfo exportGit(ref<Store> store, const std::string & uri,
-    std::experimental::optional<std::string> ref, std::string rev,
+    std::optional<std::string> ref, std::string rev,
     const std::string & name)
 {
     if (evalSettings.pureEval && rev == "")
@@ -190,7 +190,7 @@ GitInfo exportGit(ref<Store> store, const std::string & uri,
 static void prim_fetchGit(EvalState & state, const Pos & pos, Value * * args, Value & v)
 {
     std::string url;
-    std::experimental::optional<std::string> ref;
+    std::optional<std::string> ref;
     std::string rev;
     std::string name = "source";
     PathSet context;