Exec format error on aarch64

[CrazyDubya]

I am encountering an 'Exec format error' when trying to run the Copilot CLI on an aarch64 system. The pre-built binary from the npm package and the GitHub releases is not compatible with my kernel. I have tried all the standard debugging steps, including checking permissions, libraries, and SELinux. The issue persists even with SELinux in permissive mode. It seems that the pre-built binary is not compatible with my system. Kernel version: 6.12.0-103.40.4.2.el9uek.aarch64

[devm33]

👋 Hi @CrazyDubya, thanks for reporting and sorry for the difficulty here. I'm trying to reproduce this issue, but so far haven't been able to on ubuntu:latest:

$ uname -a
Linux 33739899c084 6.12.54-linuxkit #1 SMP Tue Nov  4 21:21:47 UTC 2025 aarch64 aarch64 aarch64 GNU/Linux

Could you share more details of the error you're getting and the OS you're using? If there are logs in ~/.copilot/logs that could be helpful as well. Thanks!

[suewonjp]

Hi

I'm using WSL 1 and installed the latest version with curl -fsSL https://gh.io/copilot-install | bash today and got Exec format error.

I remember the versions I installed on last December worked fine.

[devm33]

Hello, this should be fixed in the next release.

[Shinku1014]

same problem.
Linux instance-20250828-1645 6.12.0-101.33.4.3.el9uek.aarch64 #1 SMP Mon Jul 14 18:15:52 PDT 2025 aarch64 aarch64 aarch64 GNU/Linux

[centerionware]

Oracle Linux , aarch64, same problem.

I tried to install both via the install script and bash script and it installs the x86_64 version. I finally managed to get it to work by first running

npm install -g @github/copilot
wget https://github.com/github/copilot-cli/releases/download/v1.0.83/github-copilot-1.0.83-linuxmusl-arm64.tgz
tar -xvzf  github-copilot-1.0.83-linuxmusl-arm64.tgz
cd package
cp * ~/.local/lib/node_modules/@github/copilot/node_modules/@github/copilot-linux-arm64 -r