Do not block

index.js

 #!/usr/bin/env node
-const { spawnSync, spawn } = require('child_process')
+const { spawn } = require('child_process')
 const config = require('./sitegin/config')
 
 function runBabel({ onExit, opts = [] }) {
@@ -13,13 +13,23 @@ function runBabel({ onExit, opts = [] }) {
 
 function runBabelWatch() {
   runBabel({
-    onExit: () => {
-      setTimeout(() => runBabelWatch(), 500)
-    },
+    onExit: () => setTimeout(runBabelWatch(), 500),
     opts: ['--skip-initial-build', '--watch'],
   })
 }
 
+function runNodemon({ onExit }) {
+  const babel = spawn(
+    './node_modules/.bin/nodemon',
+    ['--ignore', 'build-debug', 'sitegin/index.js'],
+    { stdio: 'inherit', cwd: __dirname },
+  )
+  if (onExit) babel.on('exit', onExit)
+}
+function runNodemonWatch() {
+  runNodemon({ onExit: () => setTimeout(runNodemonWatch, 500) })
+}
+
 ;(async () => {
   const opts = await config()
   await new Promise(res =>
@@ -28,17 +38,7 @@ function runBabelWatch() {
   const watch = !opts.config.options.nowatch
   if (watch) {
     runBabelWatch()
-    spawnSync(
-      process.argv[0],
-      [
-        './node_modules/.bin/nodemon',
-        '--ignore',
-        'build-debug',
-        'sitegin/index.js',
-        ...process.argv.slice(2),
-      ],
-      { stdio: ['inherit', 'inherit', 'inherit'] },
-    )
+    runNodemonWatch()
   } else {
     require('./sitegin/index.js')
   }