diff --git a/packages/actor/package.json b/packages/actor/package.json
index 210cd33f5..a10b06e2d 100644
--- a/packages/actor/package.json
+++ b/packages/actor/package.json
@@ -3,7 +3,10 @@
   "version": "2.0.6",
   "description": "Placeholder package. Use rivetkit instead.",
   "license": "Apache-2.0",
-  "sideEffects": false,
+  "sideEffects": [
+    "./dist/chunk-*.js",
+    "./dist/chunk-*.cjs"
+  ],
   "type": "module",
   "files": [
     "dist",
diff --git a/packages/cloudflare-workers/package.json b/packages/cloudflare-workers/package.json
index f0367feee..bad6e81aa 100644
--- a/packages/cloudflare-workers/package.json
+++ b/packages/cloudflare-workers/package.json
@@ -29,7 +29,10 @@
     },
     "./tsconfig": "./dist/tsconfig.json"
   },
-  "sideEffects": false,
+  "sideEffects": [
+    "./dist/chunk-*.js",
+    "./dist/chunk-*.cjs"
+  ],
   "scripts": {
     "build": "tsup src/mod.ts",
     "check-types": "tsc --noEmit",
diff --git a/packages/core/package.json b/packages/core/package.json
index 30a65a6e4..d51d03b7b 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -3,7 +3,10 @@
   "version": "2.0.6",
   "description": "Placeholder package. Use rivetkit instead.",
   "license": "Apache-2.0",
-  "sideEffects": false,
+  "sideEffects": [
+    "./dist/chunk-*.js",
+    "./dist/chunk-*.cjs"
+  ],
   "type": "module",
   "files": [
     "dist",
diff --git a/packages/db/package.json b/packages/db/package.json
index 2324594b4..6a41787de 100644
--- a/packages/db/package.json
+++ b/packages/db/package.json
@@ -3,7 +3,10 @@
   "version": "2.0.6",
   "description": "Database providers and adapters for RivetKit actors",
   "license": "Apache-2.0",
-  "sideEffects": false,
+  "sideEffects": [
+    "./dist/chunk-*.js",
+    "./dist/chunk-*.cjs"
+  ],
   "type": "module",
   "files": [
     "dist",
diff --git a/packages/next-js/package.json b/packages/next-js/package.json
index bd84a0212..50082816c 100644
--- a/packages/next-js/package.json
+++ b/packages/next-js/package.json
@@ -17,7 +17,10 @@
     "actor",
     "microservices"
   ],
-  "sideEffects": false,
+  "sideEffects": [
+    "./dist/chunk-*.js",
+    "./dist/chunk-*.cjs"
+  ],
   "files": [
     "dist",
     "package.json"
diff --git a/packages/react/package.json b/packages/react/package.json
index 24fedd852..452d80e83 100644
--- a/packages/react/package.json
+++ b/packages/react/package.json
@@ -11,7 +11,10 @@
     "frontend",
     "ui"
   ],
-  "sideEffects": false,
+  "sideEffects": [
+    "./dist/chunk-*.js",
+    "./dist/chunk-*.cjs"
+  ],
   "files": [
     "dist",
     "package.json"
diff --git a/packages/rivetkit/package.json b/packages/rivetkit/package.json
index 40f21bdb9..c68607cb9 100644
--- a/packages/rivetkit/package.json
+++ b/packages/rivetkit/package.json
@@ -147,7 +147,10 @@
   "engines": {
     "node": ">=22.0.0"
   },
-  "sideEffects": false,
+  "sideEffects": [
+    "./dist/tsup/chunk-*.js",
+    "./dist/tsup/chunk-*.cjs"
+  ],
   "scripts": {
     "build": "tsup src/mod.ts src/client/mod.ts src/common/log.ts src/common/websocket.ts src/actor/errors.ts src/topologies/coordinate/mod.ts src/topologies/partition/mod.ts src/utils.ts src/driver-helpers/mod.ts src/driver-test-suite/mod.ts src/test/mod.ts src/inspector/mod.ts",
     "build:schema": "./scripts/compile-bare.ts compile schemas/client-protocol/v1.bare -o dist/schemas/client-protocol/v1.ts && ./scripts/compile-bare.ts compile schemas/file-system-driver/v1.bare -o dist/schemas/file-system-driver/v1.ts && ./scripts/compile-bare.ts compile schemas/actor-persist/v1.bare -o dist/schemas/actor-persist/v1.ts",
diff --git a/packages/sql-loader/package.json b/packages/sql-loader/package.json
index e7cf585a0..53e88647c 100644
--- a/packages/sql-loader/package.json
+++ b/packages/sql-loader/package.json
@@ -3,7 +3,10 @@
   "version": "2.0.6",
   "description": "SQL file loader and migration utilities for RivetKit",
   "license": "Apache-2.0",
-  "sideEffects": false,
+  "sideEffects": [
+    "./dist/chunk-*.js",
+    "./dist/chunk-*.cjs"
+  ],
   "type": "module",
   "files": [
     "dist",