diff --git a/packages/astro/src/core/build/scan-based-build.ts b/packages/astro/src/core/build/scan-based-build.ts
index facaf2466..1a4cf16e4 100644
--- a/packages/astro/src/core/build/scan-based-build.ts
+++ b/packages/astro/src/core/build/scan-based-build.ts
@@ -1,4 +1,5 @@
 import type { ViteDevServer } from 'vite';
+import type { RollupOutput, RollupWatcher } from 'rollup';
 import type { AstroConfig, RouteType } from '../../@types/astro';
 import type { AllPagesData, PageBuildData } from './types';
 import type { LogOptions } from '../logger';
@@ -40,7 +41,7 @@ function routesOfType(type: RouteType, allPages: AllPagesData) {
 	return Object.entries(allPages).filter(entryIsType(type)).reduce(reduceEntries, {});
 }
 
-export async function build(opts: ScanBasedBuildOptions) {
+export async function build(opts: ScanBasedBuildOptions): Promise<RollupOutput | RollupOutput[] | RollupWatcher> {
 	const { allPages, astroConfig, logging, origin, pageNames, routeCache, viteConfig, viteServer } = opts;
 
 	// Internal maps used to coordinate the HTML and CSS plugins.
diff --git a/packages/astro/src/vite-plugin-astro/index.ts b/packages/astro/src/vite-plugin-astro/index.ts
index 0f169caa1..829076c6c 100644
--- a/packages/astro/src/vite-plugin-astro/index.ts
+++ b/packages/astro/src/vite-plugin-astro/index.ts
@@ -1,4 +1,5 @@
 import type * as vite from 'vite';
+import type { PluginContext } from 'rollup';
 import type { AstroConfig } from '../@types/astro';
 import type { LogOptions } from '../core/logger.js';
 
@@ -82,7 +83,7 @@ export default function astro({ config, logging }: AstroPluginOptions): vite.Plu
 				return id;
 			}
 		},
-		async load(id, opts) {
+		async load(this: PluginContext, id, opts) {
 			const parsedId = parseAstroRequest(id);
 			const query = parsedId.query;
 			if (!id.endsWith('.astro') && !query.astro) {
diff --git a/packages/astro/src/vite-plugin-build-html/index.ts b/packages/astro/src/vite-plugin-build-html/index.ts
index 37a68e023..1dc6e3392 100644
--- a/packages/astro/src/vite-plugin-build-html/index.ts
+++ b/packages/astro/src/vite-plugin-build-html/index.ts
@@ -1,7 +1,7 @@
 import type { AstroConfig } from '../@types/astro';
 import type { LogOptions } from '../core/logger.js';
 import type { ViteDevServer, Plugin as VitePlugin } from 'vite';
-import type { OutputChunk, PreRenderedChunk } from 'rollup';
+import type { OutputChunk, PreRenderedChunk, PluginContext } from 'rollup';
 import type { AllPagesData } from '../core/build/types';
 import type { BuildInternals } from '../core/build/internal';
 import parse5 from 'parse5';
@@ -251,7 +251,7 @@ export function rollupPluginAstroScanHTML(options: PluginOptions): VitePlugin {
 			return outputOptions;
 		},
 
-		async generateBundle(_options, bundle) {
+		async generateBundle(this: PluginContext, _options, bundle) {
 			const facadeIdMap = new Map<string, string>();
 			for (const [chunkId, output] of Object.entries(bundle)) {
 				if (output.type === 'chunk') {