@percy/cli installation failing with npm

Incident Report for Percy

Resolved

Status: Fix released with percy/cli v1.32.11

Since 20:48 UTC on September 24, npm install @percy/cli fails with:

npm ERR! code EUNSUPPORTEDPROTOCOL
npm ERR! Unsupported URL Type "patch:": patch:got@npm%3A11.8.2#...

With npm 10 and later, the install can fail with no error message.

Cause: A third-party package that the Percy CLI depends on, @yarnpkg/core, published version 4.9.2 with a dependency format that npm can't install. Percy's services are not affected; only new CLI installs are.

Fix: We have released a patch version of percy/cli v1.32.11 and now @latest should install correctly

Workaround (for earlier percy cli versions if pinned): Add this to your project's root package.json:

"overrides": {
"@yarnpkg/core": "4.9.1"
}

Posted Sep 24, 2026 - 16:42 PDT

This incident affected: Percy.