Describe the bug

When installing the Extism CLI using the recommended installation command on macOS (darwin/arm64), the installation fails with the following error:

tar: Error opening archive: Unrecognized archive format
extism executable installed to /usr/local/bin/extism

To Reproduce

Steps to reproduce the behavior:

1. Run the installation command:

   curl -s https://get.extism.org/cli | sh

2. Confirm the prompts and enter the password when asked.
3. Observe the error message from tar.

Expected behavior

The CLI should be extracted and installed without errors.

Logs

❯ curl -s https://get.extism.org/cli | sh
Confirm installation:
  Version:
  OS: darwin
  Arch: arm64
  Sudo: /usr/bin/sudo
  Destination: /usr/local/bin/extism
  Build from source: n
Proceed? [y/N]:
y
Extracting release to /usr/local/bin/extism
Password:
tar: Error opening archive: Unrecognized archive format
extism executable installed to /usr/local/bin/extism

Environment

Additional context

• The error suggests the downloaded archive may be in an unsupported format or corrupted.
• I confirmed my network is stable and retried several times.
• The script reports "extism executable installed", but the binary is not usable.