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Installer rejects windows-arm64 despite publishing that binary #44664
Description
Description
The installer rejects Windows ARM64 with Unsupported OS/Arch: windows/arm64, even though opencode-windows-arm64.zip is built, signed and published on every release.
The arch allowlist in install omits windows-arm64:
linux-x64|linux-arm64|darwin-x64|darwin-arm64|windows-x64)
The detection just above it already maps MINGW*/MSYS*/CYGWIN* to windows and aarch64 to arm64, so the correct combo is computed and then rejected by the allowlist.
Windows ARM64 is otherwise a first-class target: it is declared in packages/opencode/script/build.ts, and publish.yml signs it, verifies the signature, repacks it and uploads opencode-windows-arm64.zip.
This also blocks opencode upgrade for curl installs, since the upgrade path re-runs this same script.
Steps to reproduce
- On Windows ARM64, open Git Bash
- Run
curl -fsSL https://opencode.ai/install | bash - It exits with
Unsupported OS/Arch: windows/arm64
I don't have ARM64 hardware, so I confirmed it from the script instead: the allowlist rejects windows-arm64, and the asset it would download returns HTTP 200 on the latest release.
Operating System
Windows 11 ARM64
Terminal
Git Bash
Activity
MilkyWay008 commentedon Aug 24, 2026
The
Unsupported OS/Arch: windows/arm64reject comes from the install script's arch allowlist, it simply never lists windows-arm64 even though detection maps aarch64 to arm64 and the release ships opencode-windows-arm64.zip. Until the allowlist gets the extra entry, manual install is a one-liner: grabhttps://github.com/anomalyco/opencode/releases/latest/download/opencode-windows-arm64.zip, unzip it, and drop opencode.exe somewhere on PATH, upgrade afterwards re-runs the same script so that stays manual too for now.