Setting parser is invalid:
  
  Invalid Setting:
  env or name has no reader.
  Defined at: test/OptEnvConf/LintSpec.hs:105:7 in main:OptEnvConf.LintSpec
  
  Invalid Setting:
  env or name has no metavar.
  Defined at: test/OptEnvConf/LintSpec.hs:105:7 in main:OptEnvConf.LintSpec