diff --git a/packages/next-server/lib/constants.js b/packages/next-server/lib/constants.js
index a4c5c7e2..7644dd76 100644
--- a/packages/next-server/lib/constants.js
+++ b/packages/next-server/lib/constants.js
@@ -1,7 +1,3 @@
-export const PHASE_EXPORT = 'phase-export'
-export const PHASE_PRODUCTION_BUILD = 'phase-production-build'
-export const PHASE_PRODUCTION_SERVER = 'phase-production-server'
-export const PHASE_DEVELOPMENT_SERVER = 'phase-development-server'
 export const PAGES_MANIFEST = 'pages-manifest.json'
 export const BUILD_MANIFEST = 'build-manifest.json'
 export const REACT_LOADABLE_MANIFEST = 'react-loadable-manifest.json'
diff --git a/packages/next-server/server/next-server.ts b/packages/next-server/server/next-server.ts
index 2953ff32..d42aaf1a 100644
--- a/packages/next-server/server/next-server.ts
+++ b/packages/next-server/server/next-server.ts
@@ -10,7 +10,7 @@ import {serveStatic} from './serve-static'
 import Router, {route, Route} from './router'
 import { isInternalUrl, isBlockedPage } from './utils'
 import loadConfig from 'next-server/next-config'
-import {PHASE_PRODUCTION_SERVER, BUILD_ID_FILE, CLIENT_STATIC_FILES_PATH, CLIENT_STATIC_FILES_RUNTIME} from 'next-server/constants'
+import {BUILD_ID_FILE, CLIENT_STATIC_FILES_PATH, CLIENT_STATIC_FILES_RUNTIME} from 'next-server/constants'
 import * as envConfig from '../lib/runtime-config'
 import {loadComponents} from './load-components'
 
@@ -74,7 +74,7 @@ export default class Server {
   }
 
   private currentPhase(): string {
-    return PHASE_PRODUCTION_SERVER
+    return 'phase-production-server'
   }
 
   private logError(...args: any): void {
diff --git a/packages/next/build/babel/plugins/next-to-next-server.ts b/packages/next/build/babel/plugins/next-to-next-server.ts
index d2583856..e01faef7 100644
--- a/packages/next/build/babel/plugins/next-to-next-server.ts
+++ b/packages/next/build/babel/plugins/next-to-next-server.ts
@@ -10,9 +10,6 @@ export default function NextToNextServer (): PluginObj {
         if (source === 'next/dynamic') {
           path.node.source.value = 'next-server/dynamic'
         }
-        if (source === 'next/constants') {
-          path.node.source.value = 'next-server/constants'
-        }
         if (source === 'next/config') {
           path.node.source.value = 'next-server/config'
         }
diff --git a/packages/next/build/index.ts b/packages/next/build/index.ts
index c60b9485..3b1d1c95 100644
--- a/packages/next/build/index.ts
+++ b/packages/next/build/index.ts
@@ -1,7 +1,7 @@
 import { join } from 'path'
 import nanoid from 'nanoid'
 import loadConfig from 'next-server/next-config'
-import { PHASE_PRODUCTION_BUILD } from 'next-server/constants'
+import { PHASE_PRODUCTION_BUILD } from '../lib/constants'
 import getBaseWebpackConfig from './webpack-config'
 import {generateBuildId} from './generate-build-id'
 import {writeBuildId} from './write-build-id'
diff --git a/packages/next/export/index.js b/packages/next/export/index.js
index abcb0024..8ed1d2dd 100644
--- a/packages/next/export/index.js
+++ b/packages/next/export/index.js
@@ -6,7 +6,8 @@ import mkdirp from 'mkdirp-then'
 import { resolve, join } from 'path'
 import { existsSync, readFileSync } from 'fs'
 import loadConfig from 'next-server/next-config'
-import { PHASE_EXPORT, SERVER_DIRECTORY, PAGES_MANIFEST, CONFIG_FILE, BUILD_ID_FILE, CLIENT_STATIC_FILES_PATH } from 'next-server/constants'
+import { PHASE_EXPORT } from '../lib/constants'
+import { SERVER_DIRECTORY, PAGES_MANIFEST, CONFIG_FILE, BUILD_ID_FILE, CLIENT_STATIC_FILES_PATH } from 'next-server/constants'
 import * as envConfig from 'next-server/config'
 import createProgress from 'tty-aware-progress'
 
diff --git a/packages/next/lib/constants.js b/packages/next/lib/constants.js
index 14f074da..1296f7f9 100644
--- a/packages/next/lib/constants.js
+++ b/packages/next/lib/constants.js
@@ -10,3 +10,8 @@ export const NEXT_PROJECT_ROOT_DIST_SERVER = join(NEXT_PROJECT_ROOT_DIST, 'serve
 // we have to use a private alias
 export const PAGES_DIR_ALIAS = 'private-next-pages'
 export const DOT_NEXT_ALIAS = 'private-dot-next'
+
+export const PHASE_EXPORT = 'phase-export'
+export const PHASE_PRODUCTION_BUILD = 'phase-production-build'
+export const PHASE_PRODUCTION_SERVER = 'phase-production-server'
+export const PHASE_DEVELOPMENT_SERVER = 'phase-development-server'
diff --git a/packages/next/server/next-dev-server.js b/packages/next/server/next-dev-server.js
index 8a4b630a..011488d9 100644
--- a/packages/next/server/next-dev-server.js
+++ b/packages/next/server/next-dev-server.js
@@ -2,7 +2,7 @@ import Server from 'next-server/dist/server/next-server'
 import { join } from 'path'
 import HotReloader from './hot-reloader'
 import {route} from 'next-server/dist/server/router'
-import {PHASE_DEVELOPMENT_SERVER} from 'next-server/constants'
+import {PHASE_DEVELOPMENT_SERVER} from '../lib/constants'
 import ErrorDebug from './error-debug'
 
 export default class DevServer extends Server {