diff --git a/.github/workflows/dev-package-test.yml b/.github/workflows/dev-package-test.yml
index b60bd2c7f9..27b3ae34e3 100644
--- a/.github/workflows/dev-package-test.yml
+++ b/.github/workflows/dev-package-test.yml
@@ -22,8 +22,6 @@ jobs:
         NPM_CLIENT:
           - "yarn"
           - "npm"
-        # [prettierx] skip on pnpm for now (...)
-        SKIP_NPM_CLIENT_TEST:
           - "pnpm"
     env:
       INSTALL_PACKAGE: true
diff --git a/scripts/install-prettier.js b/scripts/install-prettier.js
index 5932be8343..f6db9a3cae 100644
--- a/scripts/install-prettier.js
+++ b/scripts/install-prettier.js
@@ -4,12 +4,12 @@ const path = require("path");
 const shell = require("shelljs");
 const tempy = require("tempy");
 
-// [prettierx] package name & peer dependencies:
-const { name, devDependencies } = require("../package.json");
-
-// [prettierx] peer dependency versions:
-const flowParserVersion = devDependencies["flow-parser"];
-const typescriptVersion = devDependencies.typescript;
+// [prettierx]: optional dep support & fork package name from package.json
+const {
+  devDependencies,
+  peerDependenciesMeta,
+  name,
+} = require("../package.json");
 
 shell.config.fatal = true;
 
@@ -22,32 +22,32 @@ module.exports = (packageDir) => {
   const tarPath = path.join(tmpDir, file);
 
   shell.exec(`${client} init -y`, { cwd: tmpDir, silent: true });
+
+  // [prettierx]: typescript/flow-parser optional dep support
+  const args = [
+    `"${tarPath}"`,
+    ...Object.entries(peerDependenciesMeta)
+      .filter(([, meta]) => meta.optional)
+      .map(([dep]) => `${dep}@${devDependencies[dep]}`),
+  ].join(" ");
+
   let installCommand = "";
   switch (client) {
     case "npm":
-      // [prettierx] peer dependencies via npm:
-      shell.exec(`npm i flow-parser@${flowParserVersion}`, { cwd: tmpDir });
-      shell.exec(`npm i typescript@${typescriptVersion}`, { cwd: tmpDir });
       // npm fails when engine requirement only with `--engine-strict`
-      installCommand = `npm install "${tarPath}" --engine-strict`;
+      installCommand = `npm install ${args} --engine-strict`;
       break;
     case "pnpm":
-      // [prettierx] skip peer dependencies via pnpm for now (...)
-      // shell.exec(`pnpm add flow-parser@${flowParserVersion}`, { cwd: tmpDir });
-      // shell.exec(`pnpm add typescript@${typescriptVersion}`, { cwd: tmpDir });
       // Note: current pnpm can't work with `--engine-strict` and engineStrict setting in `.npmrc`
-      installCommand = `pnpm add "${tarPath}"`;
+      installCommand = `pnpm add ${args}`;
       break;
     default:
-      // [prettierx] peer dependencies via Yarn:
-      shell.exec(`yarn add flow-parser@${flowParserVersion}`, { cwd: tmpDir });
-      shell.exec(`yarn add typescript@${typescriptVersion}`, { cwd: tmpDir });
       // yarn fails when engine requirement not compatible by default
-      installCommand = `yarn add "${tarPath}"`;
+      installCommand = `yarn add ${args}`;
   }
 
   shell.exec(installCommand, { cwd: tmpDir });
 
-  // [prettierx] use package name:
+  // [prettierx] use fork package name:
   return path.join(tmpDir, "node_modules", name);
 };