/var/lang/lib/node_modules/npm/lib/utils
This explorer reads the filesystem of the server it runs on, so /workspace/user isn't present here. Browsing and the terminal still work against this server's own disk from /.
const isWindowsShell = (process.platform === 'win32') && !/^MINGW(32|64)$/.test(process.env.MSYSTEM) && process.env.TERM !== 'cygwin' exports.isWindowsShell = isWindowsShell