diff --git a/packages/runtime/src/helpers/files.ts b/packages/runtime/src/helpers/files.ts
index 93bf733ade..cda8b13dc8 100644
--- a/packages/runtime/src/helpers/files.ts
+++ b/packages/runtime/src/helpers/files.ts
@@ -404,19 +404,19 @@ const baseServerReplacements: Array<[string, string]> = [
 const nextServerReplacements: Array<[string, string]> = [
   [
     `getMiddlewareManifest() {\n        if (this.minimalMode) return null;`,
-    `getMiddlewareManifest() {\n        if (this.minimalMode || (process.env.NEXT_DISABLE_NETLIFY_EDGE !== 'true' && process.env.NEXT_DISABLE_NETLIFY_EDGE !== '1')) return null;`,
+    `getMiddlewareManifest() {\n        if (this.minimalMode || (process.env.NETLIFY && process.env.NEXT_DISABLE_NETLIFY_EDGE !== 'true' && process.env.NEXT_DISABLE_NETLIFY_EDGE !== '1')) return null;`,
   ],
   [
     `generateCatchAllMiddlewareRoute(devReady) {\n        if (this.minimalMode) return []`,
-    `generateCatchAllMiddlewareRoute(devReady) {\n        if (this.minimalMode || (process.env.NEXT_DISABLE_NETLIFY_EDGE !== 'true' && process.env.NEXT_DISABLE_NETLIFY_EDGE !== '1')) return [];`,
+    `generateCatchAllMiddlewareRoute(devReady) {\n        if (this.minimalMode || (process.env.NETLIFY && process.env.NEXT_DISABLE_NETLIFY_EDGE !== 'true' && process.env.NEXT_DISABLE_NETLIFY_EDGE !== '1')) return [];`,
   ],
   [
     `generateCatchAllMiddlewareRoute() {\n        if (this.minimalMode) return undefined;`,
-    `generateCatchAllMiddlewareRoute() {\n        if (this.minimalMode || (process.env.NEXT_DISABLE_NETLIFY_EDGE !== 'true' && process.env.NEXT_DISABLE_NETLIFY_EDGE !== '1')) return undefined;`,
+    `generateCatchAllMiddlewareRoute() {\n        if (this.minimalMode || (process.env.NETLIFY && process.env.NEXT_DISABLE_NETLIFY_EDGE !== 'true' && process.env.NEXT_DISABLE_NETLIFY_EDGE !== '1')) return undefined;`,
   ],
   [
     `getMiddlewareManifest() {\n        if (this.minimalMode) {`,
-    `getMiddlewareManifest() {\n        if (!this.minimalMode && (process.env.NEXT_DISABLE_NETLIFY_EDGE === 'true' || process.env.NEXT_DISABLE_NETLIFY_EDGE === '1')) {`,
+    `getMiddlewareManifest() {\n        if (!this.minimalMode && (process.env.NETLIFY && process.env.NEXT_DISABLE_NETLIFY_EDGE === 'true' || process.env.NEXT_DISABLE_NETLIFY_EDGE === '1')) {`,
   ],
 ]