path.os.abspath returning the wrong path

[Aedial]

At the line 61 of unityextract :
def get_output_path(self, filename):
basedir = os.path.abspath(self.args.outdir)
path = os.path.join(basedir, filename)
dirs = os.path.dirname(path)

The os.path.abspath change the self.arg.outdir to an incorrect path. The tests I ran gave me this :
outdir : D:\\Personnel\\Jeux\\Chain Strike\\Extractor\\res\\shaders
basedir : D:\\Personnel\\Jeux\\Chain Strike\\Utility\\ D:\\Personnel\\Jeux\\Chain Strike\\Extractor\\res\\shaders
path : D:\\Personnel\\Jeux\\Chain Strike\\Utility\\ D:\\Personnel\\Jeux\\Chain Strike\\Extractor\\res\\shaders\\Unlit - Transparent Colored.cg
dirs : D:\\Personnel\\Jeux\\Chain Strike\\Utility\\ D:\\Personnel\\Jeux\\Chain Strike\\Extractor\\res\\shaders

The os.path.abspath concatenated the cwd of the file I was running with the correct path. It was messing with the makedirs and returning an error each time (OSError: [WinError 123]).
It's not hard to fix, but quite annoying to find without an accurate debugging.

Edit : I forgot to say that I used subprocess.call / subprocess.Popen to call the command. It works fine with the command-line tool.
Other weird behavior : using "-o path" in the command raise the error, but using "-opath" works just fine.