diff --git a/packages/next/build/swc/index.js b/packages/next/build/swc/index.js
index bd520574fb27212..0af42f4dc0ae743 100644
--- a/packages/next/build/swc/index.js
+++ b/packages/next/build/swc/index.js
@@ -63,6 +63,7 @@ export async function loadBindings() {
   if (pendingBindings) {
     return pendingBindings
   }
+  const isCustomTurbopack = await __isCustomTurbopackBinary()
   pendingBindings = new Promise(async (resolve, reject) => {
     if (!lockfilePatchPromise.cur) {
       // always run lockfile check once so that it gets patched
@@ -86,7 +87,7 @@ export async function loadBindings() {
     }
 
     try {
-      return resolve(loadNative())
+      return resolve(loadNative(isCustomTurbopack))
     } catch (a) {
       attempts = attempts.concat(a)
     }
@@ -262,7 +263,7 @@ async function loadWasm(importPath = '') {
   throw attempts
 }
 
-function loadNative() {
+function loadNative(isCustomTurbopack = false) {
   if (nativeBindings) {
     return nativeBindings
   }
@@ -375,7 +376,60 @@ function loadNative() {
             ...options,
             noOpen: options.noOpen ?? true,
           }
-          bindings.startTurboDev(toBuffer(devOptions))
+
+          if (!isCustomTurbopack) {
+            bindings.startTurboDev(toBuffer(devOptions))
+          } else if (!!__INTERNAL_CUSTOM_TURBOPACK_BINARY) {
+            console.warn(
+              `Loading custom turbopack binary from ${__INTERNAL_CUSTOM_TURBOPACK_BINARY}`
+            )
+
+            return new Promise((resolve, reject) => {
+              const spawn = require('next/dist/compiled/cross-spawn')
+              const args = []
+
+              Object.entries(devOptions).forEach(([key, value]) => {
+                let cli_key = `--${key.replace(
+                  /[A-Z]/g,
+                  (m) => '-' + m.toLowerCase()
+                )}`
+                if (key === 'dir') {
+                  args.push(value)
+                } else if (typeof value == 'boolean' && value === true) {
+                  args.push(cli_key)
+                } else if (typeof value != 'boolean' && !!value) {
+                  args.push(cli_key, value)
+                }
+              })
+
+              console.warn(`Running turbopack with args: [${args.join(' ')}]`)
+
+              const child = spawn(__INTERNAL_CUSTOM_TURBOPACK_BINARY, args, {
+                stdio: 'inherit',
+                env: {
+                  ...process.env,
+                },
+              })
+              child.on('close', (code) => {
+                if (code !== 0) {
+                  reject({
+                    command: `${__INTERNAL_CUSTOM_TURBOPACK_BINARY} ${args.join(
+                      ' '
+                    )}`,
+                  })
+                  return
+                }
+                resolve(0)
+              })
+            })
+          } else if (!!__INTERNAL_CUSTOM_TURBOPACK_BINDINGS) {
+            console.warn(
+              `Loading custom turbopack bindings from ${__INTERNAL_CUSTOM_TURBOPACK_BINARY}`
+            )
+            console.warn(`Running turbopack with args: `, devOptions)
+
+            require(__INTERNAL_CUSTOM_TURBOPACK_BINDINGS).startDev(devOptions)
+          }
         },
         startTrace: (options = {}) =>
           bindings.runTurboTracing(toBuffer({ exact: true, ...options })),