diff --git a/packages/angular_devkit/build_angular/src/utils/tailwind.ts b/packages/angular_devkit/build_angular/src/utils/tailwind.ts
index c49e20bbc8d6..dd1c3e4f6f81 100644
--- a/packages/angular_devkit/build_angular/src/utils/tailwind.ts
+++ b/packages/angular_devkit/build_angular/src/utils/tailwind.ts
@@ -28,7 +28,7 @@ export async function findTailwindConfigurationFile(
   );
 
   // A configuration file can exist in the project or workspace root
-  for await (const { root, files } of dirEntries) {
+  for (const { root, files } of await Promise.all(dirEntries)) {
     for (const potentialConfig of tailwindConfigFiles) {
       if (files.has(potentialConfig)) {
         return join(root, potentialConfig);
diff --git a/packages/angular_devkit/schematics/src/rules/base.ts b/packages/angular_devkit/schematics/src/rules/base.ts
index 5b14e927db65..ab91954b83da 100644
--- a/packages/angular_devkit/schematics/src/rules/base.ts
+++ b/packages/angular_devkit/schematics/src/rules/base.ts
@@ -35,8 +35,14 @@ export function empty(): Source {
 export function chain(rules: Iterable<Rule> | AsyncIterable<Rule>): Rule {
   return async (initialTree, context) => {
     let intermediateTree: Observable<Tree> | undefined;
-    for await (const rule of rules) {
-      intermediateTree = callRule(rule, intermediateTree ?? initialTree, context);
+    if (Symbol.asyncIterator in rules) {
+      for await (const rule of rules) {
+        intermediateTree = callRule(rule, intermediateTree ?? initialTree, context);
+      }
+    } else {
+      for (const rule of rules) {
+        intermediateTree = callRule(rule, intermediateTree ?? initialTree, context);
+      }
     }
 
     return () => intermediateTree;