diff --git a/.changeset/wide-adults-smell.md b/.changeset/wide-adults-smell.md
new file mode 100644
index 000000000000..d370bdc4f780
--- /dev/null
+++ b/.changeset/wide-adults-smell.md
@@ -0,0 +1,5 @@
+---
+'astro': patch
+---
+
+Fix build errors being ignored when build.concurrency > 1
diff --git a/packages/astro/src/core/build/generate.ts b/packages/astro/src/core/build/generate.ts
index f612ec7fa075..6514fedc02d1 100644
--- a/packages/astro/src/core/build/generate.ts
+++ b/packages/astro/src/core/build/generate.ts
@@ -297,7 +297,7 @@ async function generatePage(
 				const path = paths[i];
 				promises.push(limit(() => generatePathWithLogs(path, route, i, paths, true)));
 			}
-			await Promise.allSettled(promises);
+			await Promise.all(promises);
 		} else {
 			for (let i = 0; i < paths.length; i++) {
 				const path = paths[i];
diff --git a/packages/astro/test/build-concurrency.test.js b/packages/astro/test/build-concurrency.test.js
new file mode 100644
index 000000000000..5f99eefeb348
--- /dev/null
+++ b/packages/astro/test/build-concurrency.test.js
@@ -0,0 +1,29 @@
+import * as assert from 'node:assert/strict';
+import { before, describe, it } from 'node:test';
+import { loadFixture } from './test-utils.js';
+
+describe('Building with concurrency > 1', () => {
+	/** @type {import('./test-utils').Fixture} */
+	let fixture;
+
+	before(async () => {
+		fixture = await loadFixture({
+			root: './fixtures/build-concurrency/',
+			build: {
+				concurrency: 2,
+			},
+		});
+	});
+	
+	it('Errors and exits', async () => {
+		let built = false
+		try {
+			await fixture.build();
+			built = true
+		} catch (err) {
+			assert.match(err.message, /This is a test/)
+		}
+		
+		assert.equal(built, false, 'Build should not complete');
+	});
+});
diff --git a/packages/astro/test/fixtures/build-concurrency/package.json b/packages/astro/test/fixtures/build-concurrency/package.json
new file mode 100644
index 000000000000..d5dfaf4598e9
--- /dev/null
+++ b/packages/astro/test/fixtures/build-concurrency/package.json
@@ -0,0 +1,8 @@
+{
+  "name": "@test/concurrency",
+  "version": "0.0.0",
+  "private": true,
+  "dependencies": {
+    "astro": "workspace:*"
+  }
+}
diff --git a/packages/astro/test/fixtures/build-concurrency/src/pages/index.astro b/packages/astro/test/fixtures/build-concurrency/src/pages/index.astro
new file mode 100644
index 000000000000..3ce79d51ca0d
--- /dev/null
+++ b/packages/astro/test/fixtures/build-concurrency/src/pages/index.astro
@@ -0,0 +1,5 @@
+---
+throw Error('This is a test')
+---
+
+<h1>Hello world!</h1>
diff --git a/packages/astro/test/fixtures/build-concurrency/src/pages/page2.astro b/packages/astro/test/fixtures/build-concurrency/src/pages/page2.astro
new file mode 100644
index 000000000000..ecfc83400ea5
--- /dev/null
+++ b/packages/astro/test/fixtures/build-concurrency/src/pages/page2.astro
@@ -0,0 +1,4 @@
+---
+---
+
+<h1>Page 2</h1>
diff --git a/pnpm-lock.yaml b/pnpm-lock.yaml
index 24d6fca45dfc..e817378c0375 100644
--- a/pnpm-lock.yaml
+++ b/pnpm-lock.yaml
@@ -2414,6 +2414,12 @@ importers:
         specifier: ^10.26.4
         version: 10.26.4
 
+  packages/astro/test/fixtures/build-concurrency:
+    dependencies:
+      astro:
+        specifier: workspace:*
+        version: link:../../..
+
   packages/astro/test/fixtures/build-readonly-file:
     dependencies:
       astro:
@@ -9950,7 +9956,6 @@ packages:
 
   libsql@0.5.4:
     resolution: {integrity: sha512-GEFeWca4SDAQFxjHWJBE6GK52LEtSskiujbG3rqmmeTO9t4sfSBKIURNLLpKDDF7fb7jmTuuRkDAn9BZGITQNw==}
-    cpu: [x64, arm64, wasm32]
     os: [darwin, linux, win32]
 
   lightningcss-darwin-arm64@1.29.2: