Avoid `fmt` when constructor already does it

There is a correctnes issue here, but #3724 will fix that. This is just
a cleanup for brevity's sake.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/nix/repl.cc b/src/nix/repl.cc
index 1f9d4fb4e..ec8a57a8e 100644
--- a/src/nix/repl.cc
+++ b/src/nix/repl.cc
@@ -119,7 +119,7 @@ std::string runNix(Path program, const Strings & args,
     });
 
     if (!statusOk(res.first))
-        throw ExecError(res.first, fmt("program '%1%' %2%", program, statusToString(res.first)));
+        throw ExecError(res.first, "program '%1%' %2%", program, statusToString(res.first));
 
     return res.second;
 }