diff --git a/default.nix b/default.nix
index e5afb81..bfa8320 100644
--- a/default.nix
+++ b/default.nix
@@ -9,7 +9,7 @@
     buildInputs = [
       cardanoNodeProject.cardano-cli   # required for KES key rotation
       niv
-      nixops
+      nixopsUnstable                   # work around for issue #127423
     ];
     NIX_PATH = "nixpkgs=${path}";
     NIXOPS_DEPLOYMENT = "${globals.deploymentName}";