Checking /nix/store/53r7hx2qbdf983snzx64qc5c36kbvsjq-fleet-alert-rules.yaml
  SUCCESS: 11 rules found

Checking /nix/store/xlsyhfyi69fanskx355hqfff8nq4zsi9-fleet-alert-rules-malformed.yaml
  FAILED:
/nix/store/xlsyhfyi69fanskx355hqfff8nq4zsi9-fleet-alert-rules-malformed.yaml: 1:758: group "fleet-alert", rule 2, "HostOOMKill": could not parse expression: 1:39: parse error: unclosed left parenthesis
mutant malformedExpression rejected