diff --git a/packages/astro/src/core/build/plugins/plugin-content.ts b/packages/astro/src/core/build/plugins/plugin-content.ts
index 3f0da0d5f7..28000e7339 100644
--- a/packages/astro/src/core/build/plugins/plugin-content.ts
+++ b/packages/astro/src/core/build/plugins/plugin-content.ts
@@ -508,11 +508,15 @@ export function pluginContent(
 					return;
 				}
 				// Cache build output of chunks and assets
+				const promises: Promise<void[] | undefined>[] = []
 				for (const { cached, dist } of cachedBuildOutput) {
 					if (fsMod.existsSync(dist)) {
-						await copyFiles(dist, cached, true);
+						promises.push(copyFiles(dist, cached, true));
 					}
 				}
+
+				if (promises.length)
+					await Promise.all(promises)
 			},
 		},
 	};