Install on Windows10 fails when HOME is not set. EPERM mkdir ‘' fails

set HOME=%USERPROFILE%
curl -fsSL https://claude.ai/install.cmd -o install.cmd && install.cmd
Setting up Claude Code...
√ Claude Code successfully installed!
  Version: 2.1.71
  Location: C:\Users\user1\.local\bin\claude.exe
  Next: Run claude --help to get started
‼ Setup notes:
  • Native installation exists but C:\Users\user1\.local\bin is not in your PATH. Add it by opening: System
  Properties → Environment Variables → Edit User PATH → New → Add the path above. Then restart your terminal.
Installation complete!