{ runCommand }:
{

  b64decode =
    input:
    builtins.readFile (
      runCommand "b64decode" { } ''
        base64 -d >$out <${builtins.toFile "input" input}
      ''
    );

  b64encode =
    input:
    builtins.readFile (
      runCommand "b64encode" { } ''
        base64 -w0 >$out <${builtins.toFile "input" input}
      ''
    );

}