diff --git a/default.nix b/default.nix
index 4023bb0..e622ebe 100644
--- a/default.nix
+++ b/default.nix
@@ -13,7 +13,7 @@ with import ./nix args; {
       alejandraUnstable # The Uncompromising Nix Code Formatter
       cardanoNodeProject.cardano-cli # required for KES key rotation
       niv
-      nixopsUnstable # work around for issue #127423
+      nixops_unstable # work around for issue #127423
       tea # Gitea official CLI client
       treefmt # one CLI to format the code tree
     ];