Use Yarn PnPify

.yarn/sdks/integrations.yml

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+# This file is automatically generated by PnPify.
+# Manual changes will be lost!
+
+integrations:
+  - vscode

.yarn/sdks/prettier/index.js

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+#!/usr/bin/env node
+
+const {existsSync} = require(`fs`);
+const {createRequire, createRequireFromPath} = require(`module`);
+const {resolve} = require(`path`);
+
+const relPnpApiPath = "../../../.pnp.js";
+
+const absPnpApiPath = resolve(__dirname, relPnpApiPath);
+const absRequire = (createRequire || createRequireFromPath)(absPnpApiPath);
+
+if (existsSync(absPnpApiPath)) {
+  if (!process.versions.pnp) {
+    // Setup the environment to be able to require prettier/index.js
+    require(absPnpApiPath).setup();
+  }
+}
+
+// Defer to the real prettier/index.js your application uses
+module.exports = absRequire(`prettier/index.js`);

.yarn/sdks/prettier/package.json

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+{
+  "name": "prettier",
+  "version": "2.3.0-pnpify",
+  "main": "./index.js",
+  "type": "commonjs"
+}