fixup! fixup! lookup: yarn, mark win as flaky

Author: Trott

lib/lookup.json

@@ -28,7 +28,7 @@
     "envVar": { "TEST_IGNORE_TIMEOUT_FAILURES": true },
     "install": ["install", "--mode", "skip-build"],
     "maintainers": ["arcanis", "merceyz", "paul-soporan", "larixer"],
-    "prefix": "@yarnpkg/cli@",
+    "head": true,
     "repo": "https://github.com/yarnpkg/berry",
     "scripts": [
       "build:cli --no-minify",