extractfsb yields filesystem error

Hi Puzzle, Noobcraft here. I had some spare time this morning to play around with your tool and I ran into this issue. It could be that I'm just using it incorrectly, but I figured I'd send you some feedback anyway.

Steps to reproduce:

• Copy general.bank from \DarkestDungeon\audio\secondary_banks to any target folder.
• From that same target folder run the following command:

$ darkest_tools extractfsb general.bank
fs.js:955
  binding.stat(pathModule._makeLong(path));
          ^

Error: ENOENT: no such file or directory, stat 'D:\Code\darkestdungeon\assets\audio\general.bank_out'
    at Object.fs.statSync (fs.js:955:11)
    at Object.fsb.extract (C:\Users\kaspe\AppData\Roaming\npm\node_modules\darkest_dungeon_tools\lib\extract_fsb.js:15:12)
    at Object.main (C:\Users\kaspe\AppData\Roaming\npm\node_modules\darkest_dungeon_tools\bin\ddt_extract_fsb.js:46:19)
    at Object.<anonymous> (C:\Users\kaspe\AppData\Roaming\npm\node_modules\darkest_dungeon_tools\bin\cli.js:53:20)
    at Module._compile (module.js:624:30)
    at Object.Module._extensions..js (module.js:635:10)
    at Module.load (module.js:545:32)
    at tryModuleLoad (module.js:508:12)
    at Function.Module._load (module.js:500:3)
    at Function.Module.runMain (module.js:665:10)