diff --git a/packages/astro/src/core/build/page-data.ts b/packages/astro/src/core/build/page-data.ts
index ce9e60622e..15efea73b5 100644
--- a/packages/astro/src/core/build/page-data.ts
+++ b/packages/astro/src/core/build/page-data.ts
@@ -35,6 +35,8 @@ export async function collectPagesData(
 	// and is then cached across all future SSR builds. In the past, we've had trouble
 	// with parallelized builds without guaranteeing that this is called first.
 	for (const route of manifest.routes) {
+		// Generate a unique key to identify each page in the build process.
+		const key = `${route.route}_${route.component}`;
 		// static route:
 		if (route.pathname) {
 			const routeCollectionLogTimeout = setInterval(() => {
@@ -47,8 +49,8 @@ export async function collectPagesData(
 				clearInterval(routeCollectionLogTimeout);
 			}, 10000);
 			builtPaths.add(route.pathname);
-
-			allPages[route.component] = {
+			allPages[key] = {
+				key: key,
 				component: route.component,
 				route,
 				moduleSpecifier: '',
@@ -72,8 +74,8 @@ export async function collectPagesData(
 			continue;
 		}
 		// dynamic route:
-
-		allPages[route.component] = {
+		allPages[key] = {
+			key: key,
 			component: route.component,
 			route,
 			moduleSpecifier: '',
diff --git a/packages/astro/src/core/build/types.ts b/packages/astro/src/core/build/types.ts
index 9608ba04c5..b83e6e33af 100644
--- a/packages/astro/src/core/build/types.ts
+++ b/packages/astro/src/core/build/types.ts
@@ -21,6 +21,7 @@ export type StylesheetAsset =
 	| { type: 'external'; src: string };
 
 export interface PageBuildData {
+	key: string;
 	component: ComponentPath;
 	route: RouteData;
 	moduleSpecifier: string;
diff --git a/packages/create-astro/test/fixtures/not-empty/package.json b/packages/create-astro/test/fixtures/not-empty/package.json
index 516149e6d0..d3f61d640c 100644
--- a/packages/create-astro/test/fixtures/not-empty/package.json
+++ b/packages/create-astro/test/fixtures/not-empty/package.json
@@ -6,4 +6,4 @@
     "build": "astro build",
     "preview": "astro preview"
   }
-}
+}
\ No newline at end of file