Persisted workspace missing on Windows

Hi there,
We’re trying to build our Electron app on the win/vs2019 executor with bash.exe. As part of our job, we call attach_workspace and attach the workspace at /tmp/env. The content that should have been persisted to that directory is not there on Windows, though - /tmp exists but /tmp/env does not. The workspace contents are accessible by all of our other jobs, which are running on various Linux or MacOS images. Is there something additional I need to do in order to attach our workspace under a Windows image?