During flutter pub cache clean, "OS Error: The system cannot find the path specified"

[christopherfujino]

Environment

• Dart version (run dart --version):
• OS kind and version (e.g. "Windows 10, version 1809" or "macOS 12.4"):
• Are you using the Chinese community mirror or a corporate firewall?
  no

Problem

File system exception while trying to delete the pub cache via flutter pub cache clean:

 flutter pub cache clean
This will remove everything inside C:\Users\Nixos\AppData\Local\Pub\Cache.
You will have to run `flutter pub get` again in each project.
Are you sure? (y/N)? y
Removing pub cache directory C:\Users\Nixos\AppData\Local\Pub\Cache.
Deletion failed, path = 'C:\Users\Nixos\AppData\Local\Pub\Cache' (OS Error: The system cannot find the path specified.
, errno = 3)

I'm fairly sure this is a purely pub/dart:io issue, as it doesn't look like the flutter tool is doing much here (other than setting some env variables) before delegating to pub cache clean.

Flutter tracking issue: flutter/flutter#144140

[sigurdm]

I asked some questions on the flutter version on this issue.