diff --git a/src/nix/develop.cc b/src/nix/develop.cc
index 578258394..3c44fdb0e 100644
--- a/src/nix/develop.cc
+++ b/src/nix/develop.cc
@@ -239,7 +239,7 @@ struct Common : InstallableCommand, MixProfile
 
         out << buildEnvironment.bashFunctions << "\n";
 
-        out << "export NIX_BUILD_TOP=\"$(mktemp -d --tmpdir nix-shell.XXXXXX)\"\n";
+        out << "export NIX_BUILD_TOP=\"$(mktemp -d -t nix-shell.XXXXXX)\"\n";
         for (auto & i : {"TMP", "TMPDIR", "TEMP", "TEMPDIR"})
             out << fmt("export %s=\"$NIX_BUILD_TOP\"\n", i);