1 files changed, 1 insertions, 1 deletions
diff --git a/src/nix/copy.cc b/src/nix/copy.cc
index b2165cb8f..9f1a80d07 100644
--- a/src/nix/copy.cc
+++ b/src/nix/copy.cc
@@ -46,7 +46,7 @@ struct CmdCopy : StorePathsCommand
     void run(ref<Store> srcStore, Paths storePaths) override
     {
         if (srcUri.empty() && dstUri.empty())
-            throw UsageError("you must pass ‘--from’ and/or ‘--to’");
+            throw UsageError("you must pass '--from' and/or '--to'");
 
         ref<Store> dstStore = dstUri.empty() ? openStore() : openStore(dstUri);