diff --git a/.github/workflows/ambar-core.yaml b/.github/workflows/ambar-core.yaml
index ac2dbe3..513a4c3 100644
--- a/.github/workflows/ambar-core.yaml
+++ b/.github/workflows/ambar-core.yaml
@@ -31,4 +31,8 @@ jobs:
       - name: Test
         run: cd ambar-core && pnpm test
 
+      - name: Build
+        run: cd ambar-core && pnpm build
+
+
 
diff --git a/ambar-core/src/json/decoder.ts b/ambar-core/src/json/decoder.ts
index a5f9ad1..f19b841 100644
--- a/ambar-core/src/json/decoder.ts
+++ b/ambar-core/src/json/decoder.ts
@@ -61,7 +61,6 @@ export {
 
 import { Result, Success, Failure, traverse } from '../result';
 import { Maybe, Just, Nothing, Nullable } from '../maybe';
-import * as e from './encoder.ts';
 import { List } from '../list';
 import { Json } from './types';