anchor.diff:      unix
       vector
       wcwidth
  +    word8
     ];
     testHaskellDepends = [
       ansi-terminal
       async
       attoparsec
       base
  +    bytestring
       cassava
       containers
       data-default
  
positive.code:   async,
    attoparsec,
    base,
    cassava,
    containers,
    data-default,
  
negative.code:     ${expect}/bin/unbuffer nix-build "\$@" 2>&1 | exec $out/bin/nom
      EOF
      chmod a+x $out/bin/nom-build
      installShellCompletion --zsh --name _nom-build ${builtins.toFile "completion.zsh" ''
        #compdef nom-build
        compdef nom-build=nix-build
      ''}
    '';
  }
  