diff --git a/scripts/compat.js b/scripts/compat.js
index aef701a07fc8..68703eef9166 100644
--- a/scripts/compat.js
+++ b/scripts/compat.js
@@ -1,79 +1,97 @@
 let fs = require('fs')
 let path = require('path')
+let { spawn } = require('child_process')
+
 let merge = require('lodash/merge')
 let fastGlob = require('fast-glob')
 
 let postcss7 = fastGlob.sync(['./**/*.postcss7.*']).filter((file) => !file.startsWith('lib/'))
 let postcss8 = fastGlob.sync(['./**/*.postcss8.*']).filter((file) => !file.startsWith('lib/'))
 
-if (process.argv.includes('--prepare')) {
-  if (postcss8.length > 0) {
-    console.error('\n\n[ABORT] Already in PostCSS 7 compatibility mode!\n\n')
-    process.exit(1)
-  }
+async function run() {
+  if (process.argv.includes('--prepare')) {
+    if (postcss8.length > 0) {
+      console.error('\n\n[ABORT] Already in PostCSS 7 compatibility mode!\n\n')
+      process.exit(1)
+    }
 
-  let mainPackageJson = require('../package.json')
-  let compatPackageJson = require('../package.postcss7.json')
+    let mainPackageJson = require('../package.json')
+    let compatPackageJson = require('../package.postcss7.json')
 
-  // Use postcss7 files
-  for (let file of postcss7) {
-    let bareFile = file.replace('.postcss7', '')
-    let postcss8File = file.replace('.postcss7', '.postcss8')
+    // Use postcss7 files
+    for (let file of postcss7) {
+      let bareFile = file.replace('.postcss7', '')
+      let postcss8File = file.replace('.postcss7', '.postcss8')
 
-    // Backup
-    copy(fromRootPath(bareFile), fromRootPath(postcss8File))
+      // Backup
+      copy(fromRootPath(bareFile), fromRootPath(postcss8File))
 
-    // Swap
-    copy(fromRootPath(file), fromRootPath(bareFile))
-  }
+      // Swap
+      copy(fromRootPath(file), fromRootPath(bareFile))
+    }
 
-  // Deep merge package.json contents
-  let packageJson = merge({}, mainPackageJson, compatPackageJson)
+    // Deep merge package.json contents
+    let packageJson = merge({}, mainPackageJson, compatPackageJson)
 
-  // Remove peerDependencies
-  delete packageJson.peerDependencies
+    // Remove peerDependencies
+    delete packageJson.peerDependencies
 
-  // Cleanup devDependencies
-  for (let key in packageJson.devDependencies) {
-    if (key.includes('postcss')) delete packageJson.devDependencies[key]
-  }
+    // Cleanup devDependencies
+    for (let key in packageJson.devDependencies) {
+      if (key.includes('postcss')) delete packageJson.devDependencies[key]
+    }
 
-  // Use new name
-  packageJson.name = '@tailwindcss/postcss7-compat'
+    // Use new name
+    packageJson.name = '@tailwindcss/postcss7-compat'
 
-  // Make sure you can publish
-  packageJson.publishConfig = { access: 'public' }
+    // Make sure you can publish
+    packageJson.publishConfig = { access: 'public' }
 
-  // Write package.json with the new contents
-  fs.writeFileSync(fromRootPath('package.json'), JSON.stringify(packageJson, null, 2), 'utf8')
+    // Write package.json with the new contents
+    fs.writeFileSync(fromRootPath('package.json'), JSON.stringify(packageJson, null, 2), 'utf8')
 
-  // Print some useful information to make publishing easy
-  console.log()
-  console.log('You can safely publish `tailwindcss` in PostCSS 7 compatibility mode:\n')
-  console.log()
-} else if (process.argv.includes('--restore')) {
-  if (postcss8.length === 0) {
-    console.error('\n\n[ABORT] Already in latest PostCSS mode!\n\n')
-    process.exit(1)
-  }
+    // Nuke node_modules
+    fs.rmdirSync(fromRootPath('node_modules'), { recursive: true })
 
-  // Use postcss8 files
-  for (let file of postcss8) {
-    let bareFile = file.replace('.postcss8', '')
+    // NPM Install with all correct stuff
+    await npmInstall()
 
-    // Restore
-    copy(fromRootPath(file), fromRootPath(bareFile))
+    // Print some useful information to make publishing easy
+    console.log()
+    console.log('You can safely publish `tailwindcss` in PostCSS 7 compatibility mode:\n')
+    console.log()
+  } else if (process.argv.includes('--restore')) {
+    if (postcss8.length === 0) {
+      console.error('\n\n[ABORT] Already in latest PostCSS mode!\n\n')
+      process.exit(1)
+    }
 
-    // Remove
-    fs.unlinkSync(fromRootPath(file))
-  }
+    // Use postcss8 files
+    for (let file of postcss8) {
+      let bareFile = file.replace('.postcss8', '')
+
+      // Restore
+      copy(fromRootPath(file), fromRootPath(bareFile))
+
+      // Remove
+      fs.unlinkSync(fromRootPath(file))
+    }
+
+    // Nuke node_modules
+    fs.rmdirSync(fromRootPath('node_modules'), { recursive: true })
 
-  // Done
-  console.log()
-  console.log('Restored from PostCSS 7 mode to latest PostCSS mode!')
-  console.log()
+    // NPM Install with all correct stuff
+    await npmInstall()
+
+    // Done
+    console.log()
+    console.log('Restored from PostCSS 7 mode to latest PostCSS mode!')
+    console.log()
+  }
 }
 
+run()
+
 // ---
 
 function fromRootPath(...paths) {
@@ -83,3 +101,21 @@ function fromRootPath(...paths) {
 function copy(fromPath, toPath) {
   fs.copyFileSync(fromPath, toPath)
 }
+
+function npmInstall() {
+  return new Promise((resolve, reject) => {
+    let child = spawn('npm', ['install', '--force'])
+
+    child.stdout.on('data', (data) => {
+      console.log(data.toString())
+    })
+
+    child.stderr.on('data', (data) => {
+      console.error(data.toString())
+    })
+
+    child.on('close', (code, signal) => {
+      ;(signal === 'SIGTERM' ? resolve : code === 0 ? resolve : reject)()
+    })
+  })
+}