diff --git a/pkgs/development/tools/haskell/vaultenv/default.nix b/pkgs/development/tools/haskell/vaultenv/default.nix
index 9b5a19700ff..9bd818255c7 100644
--- a/pkgs/development/tools/haskell/vaultenv/default.nix
+++ b/pkgs/development/tools/haskell/vaultenv/default.nix
@@ -23,4 +23,5 @@ mkDerivation rec {
   description = "Runs processes with secrets from HashiCorp Vault";
   license = stdenv.lib.licenses.bsd3;
   maintainers = with stdenv.lib.maintainers; [ lnl7 ];
+  broken = true;  # https://hydra.nixos.org/build/66706385
 }