Hit a build error with wasm-pack. Solution: downgrade to 0.9.1.

The Problem

Running wasm-pack build failed with cryptic errors. Something about missing files or build artifacts.

The Cause

Known bug in newer wasm-pack versions: GitHub issue #823

The Fix

Use wasm-pack 0.9.1:

cargo install wasm-pack --version 0.9.1 --force

Build works again.

Checking Your Version

wasm-pack --version

If you have a newer version and builds are failing, downgrade.

When to Upgrade

Check the GitHub issue. Once it’s closed and fixed, upgrade to the latest version.

For now, stick with 0.9.1 for stable builds.

Quick fix for a frustrating bug.