[BUG] Claude code install hangs on a modern Linux kernel on KVM?

Preflight Checklist

• [x] I have searched existing issues and this hasn't been reported yet
• [x] This is a single bug report (please file separate reports for different bugs)
• [x] I am using the latest version of Claude Code

What's Wrong?

Both Claude Code 2.1.200-linux-x64 and 2.1.199-linux-x64 binaries take extraordinarily long to install on Linux (Ubuntu 24.04), both a desktop (i7 laptop) and on the KVM VM. This doesn't seem normal or this expected?

What Should Happen?

It should install within minutes. Claude chatbot seems to think this at least or is that a misdiagnosis?

Error Messages/Logs

No message are put out at all, almost as if it's waiting for something.

Steps to Reproduce

simply run the install script

curl -fsSL https://claude.ai/install.sh | bash

If the save the script, rather than pipe it to bash, and then run the script with "bash -x", it gets to the same point:

+ curl -fsSL -o /root/.claude/downloads/claude-2.1.200-linux-x64 https://downloads.claude.ai/claude-code-releases/2.1.200/linux-x64/claude
+ '[' linux = darwin ']'
++ sha256sum /root/.claude/downloads/claude-2.1.200-linux-x64
++ cut '-d ' -f1
+ actual=26e42a3268979f0c5a3b6c0f375b15dd7decfaae4bb02774390d6a23f4cd51ad
+ '[' 26e42a3268979f0c5a3b6c0f375b15dd7decfaae4bb02774390d6a23f4cd51ad '!=' 26e42a3268979f0c5a3b6c0f375b15dd7decfaae4bb02774390d6a23f4cd51ad ']'
+ chmod +x /root/.claude/downloads/claude-2.1.200-linux-x64
+ echo 'Setting up Claude Code...'
Setting up Claude Code...
+ install_code=0
+ /root/.claude/downloads/claude-2.1.200-linux-x64 install

and then no output.

Claude Model

None

Is this a regression?

I don't know

Last Working Version

_No response_

Claude Code Version

2.1.200/linux-x64

Platform

Anthropic API

Operating System

Ubuntu/Debian Linux

Terminal/Shell

Other

Additional Information

_No response_