diff --git a/packages/swingset-liveslots/package.json b/packages/swingset-liveslots/package.json
index 9e2d067b2d2..bb601b85b34 100644
--- a/packages/swingset-liveslots/package.json
+++ b/packages/swingset-liveslots/package.json
@@ -14,7 +14,9 @@
     "lint-fix": "yarn lint:eslint --fix",
     "lint": "run-s --continue-on-error lint:*",
     "lint:types": "tsc",
-    "lint:eslint": "eslint ."
+    "lint:eslint": "eslint .",
+    "prepack": "tsc --build tsconfig.build.json",
+    "postpack": "git clean -f ':!src/types-index.d.ts' '*.d.ts*' '*.tsbuildinfo'"
   },
   "dependencies": {
     "@endo/errors": "^1.2.8",
@@ -36,9 +38,8 @@
     "@agoric/kmarshal": "^0.1.0"
   },
   "files": [
-    "src/**/*.js",
-    "src/**/*.d.ts",
-    "test/**/*.js",
+    "src",
+    "test",
     "tools",
     "exported.js"
   ],
diff --git a/packages/swingset-liveslots/tsconfig.build.json b/packages/swingset-liveslots/tsconfig.build.json
new file mode 100644
index 00000000000..fe5ea57d603
--- /dev/null
+++ b/packages/swingset-liveslots/tsconfig.build.json
@@ -0,0 +1,6 @@
+{
+    "extends": [
+        "./tsconfig.json",
+        "../../tsconfig-build-options.json"
+    ]
+}
diff --git a/packages/swingset-liveslots/tsconfig.json b/packages/swingset-liveslots/tsconfig.json
index e5bc0d46912..b827ae3a6d8 100644
--- a/packages/swingset-liveslots/tsconfig.json
+++ b/packages/swingset-liveslots/tsconfig.json
@@ -2,10 +2,9 @@
   "extends": "../../tsconfig.json",
   "compilerOptions": {},
   "include": [
-    "*.js",
-    "scripts/**/*.js",
-    "src/**/*.js",
-    "test/**/*.js",
-    "tools/**/*.js",
+    "scripts",
+    "src",
+    "test",
+    "tools",
   ],
 }