diff --git a/src/schematics/deploy/actions.ts b/src/schematics/deploy/actions.ts
index 9a2fb7cde..cecf255bf 100644
--- a/src/schematics/deploy/actions.ts
+++ b/src/schematics/deploy/actions.ts
@@ -13,8 +13,9 @@ import * as winston from 'winston';
 import { BuildTarget, CloudRunOptions, DeployBuilderSchema, FSHost, FirebaseTools } from '../interfaces';
 import { DEFAULT_FUNCTION_NAME, defaultFunction, defaultPackage, dockerfile, functionGen2 } from './functions-templates.js';
 
-// @ts-ignore
-const __dirname = dirname(fileURLToPath(import.meta.url));
+// eslint-disable-next-line @typescript-eslint/ban-ts-comment
+// @ts-ignore `import.meta` is rejected by the --module es2015 pass of `npm run build:jasmine`.
+const moduleDirectory = typeof __dirname === 'string' ? __dirname : dirname(fileURLToPath(import.meta.url));
 
 const { copySync, removeSync, readJsonSync } = fsExtra;
 
@@ -128,7 +129,7 @@ const findPackageVersion = (packageManager: string, name: string) => {
 const getPackageJson = (context: BuilderContext, workspaceRoot: string, options: DeployBuilderOptions, main?: string) => {
   const dependencies: Record<string, string> = {};
   const devDependencies: Record<string, string> = {};
-  const { firebaseFunctionsDependencies } = readJsonSync(join(__dirname, '..', 'versions.json'));
+  const { firebaseFunctionsDependencies } = readJsonSync(join(moduleDirectory, '..', 'versions.json'));
   if (options.ssr !== 'cloud-run') {
     Object.keys(firebaseFunctionsDependencies).forEach(name => {
       const { version, dev } = firebaseFunctionsDependencies[name];
diff --git a/tools/build.ts b/tools/build.ts
index 0d8dd38c4..ccdd02e63 100644
--- a/tools/build.ts
+++ b/tools/build.ts
@@ -313,17 +313,21 @@ function spawnPromise(command: string, args: string[]) {
   .on('error', reject));
 }
 
+// Path segments of each schematic entry point, relative to `schematics/` and without the file
+// extension: esbuild compiles the `.ts` and loadCompiledSchematics requires the emitted `.js`.
+const schematicEntryPoints = [
+  ['update', 'index'],
+  ['deploy', 'actions'],
+  ['deploy', 'builder'],
+  ['add', 'index'],
+  ['setup', 'index'],
+  ['update', 'v7', 'index'],
+  ['update', 'v21', 'index'],
+];
+
 async function compileSchematics() {
   await esbuild.build({
-    entryPoints: [
-      src('schematics', "update", "index.ts"),
-      src('schematics', "deploy", "actions.ts"),
-      src('schematics', "deploy", "builder.ts"),
-      src('schematics', "add", "index.ts"),
-      src('schematics', "setup", "index.ts"),
-      src('schematics', "update", "v7", "index.ts"),
-      src('schematics', "update", "v21", "index.ts"),
-    ],
+    entryPoints: schematicEntryPoints.map(segments => `${src('schematics', ...segments)}.ts`),
     format: "cjs",
     // turns out schematics don't support ESM, need to use webpack or shim these
     // format: "esm",
@@ -357,6 +361,25 @@ async function compileSchematics() {
     copy(src('schematics', 'setup', 'schema.json'), dest('schematics', 'setup', 'schema.json')),
   ]);
   await replaceSchematicVersions();
+  await loadCompiledSchematics();
+}
+
+/**
+ * Loads every compiled schematic entry point, so a bundle that cannot even be required fails the
+ * build instead of shipping.
+ */
+async function loadCompiledSchematics() {
+  const failures: string[] = [];
+  for (const segments of schematicEntryPoints) {
+    try {
+      require(`${dest('schematics', ...segments)}.js`);
+    } catch (error) {
+      failures.push(`  ${join(...segments)}.js: ${error}`);
+    }
+  }
+  if (failures.length) {
+    throw new Error(`Compiled schematics failed to load:\n${failures.join('\n')}`);
+  }
 }
 
 async function buildLibrary() {