diff --git a/package.json b/package.json
index 50ea82c..9f07322 100644
--- a/package.json
+++ b/package.json
@@ -14,7 +14,7 @@
   ],
   "scripts": {
     "clean": "ts-node -T scripts/clean.cts",
-    "build": "concurrently -n shell \"yarn workspace @chronocat/shell build\""
+    "build": "concurrently -n shell \"yarn workspace @chronocat/shell build\" && concurrently -n api,event \"yarn workspace @chronocat/engine-chronocat-api build\" \"yarn workspace @chronocat/engine-chronocat-event build\""
   },
   "resolutions": {
     "ts-node": "11.0.0-beta.1"
diff --git a/scripts/clean.cts b/scripts/clean.cts
index d4fc02c..e60e952 100644
--- a/scripts/clean.cts
+++ b/scripts/clean.cts
@@ -7,6 +7,10 @@ void Promise.all(
     '../packages/shell/lib',
     '../packages/shell/generated',
     '../packages/shell/tsconfig.tsbuildinfo',
+    '../packages/engine-chronocat-api/lib',
+    '../packages/engine-chronocat-api/tsconfig.tsbuildinfo',
+    '../packages/engine-chronocat-event/lib',
+    '../packages/engine-chronocat-event/tsconfig.tsbuildinfo',
     '../packages/llqqntv0/lib',
     '../packages/llqqntv1/lib',
     '../packages/docs/static/config-v0.schema.json',