diff --git a/package.json b/package.json
index 8a91e082..ab6f471d 100644
--- a/package.json
+++ b/package.json
@@ -73,7 +73,7 @@
   "scripts": {
     "build": "rollup -c build-settings/rollup.config.js",
     "build:prodsizecheck": "rollup -c build-settings/rollup.config.js --configPlatforms='browser' --configFormats='esm' --configEnvironment='production'",
-    "build:types": "yarn tsc -b -v tsconfig.json",
+    "build:types": "yarn tsc --build --verbose tsconfig-build.json",
     "watch": "rollup -c build-settings/rollup.config.js --watch",
     "clean": "rm -rf packages/wonder-stuff-*/dist && rm -rf packages/wonder-stuff-*/node_modules && rm -f packages/*/tsconfig.tsbuildinfo",
     "coverage": "yarn run jest --coverage",
@@ -85,4 +85,4 @@
     "typecheck": "tsc --noEmit",
     "nochangeset": "yarn changeset add --empty"
   }
-}
+}
\ No newline at end of file
diff --git a/packages/tsconfig-shared.json b/packages/tsconfig-shared.json
index 724ed57f..03c8f7e2 100644
--- a/packages/tsconfig-shared.json
+++ b/packages/tsconfig-shared.json
@@ -1,5 +1,6 @@
 /* Visit https://aka.ms/tsconfig to read more about this file */
 {
+  "exclude": ["dist"],
   "compilerOptions": {
     "composite": true,
     "incremental": true, // Required for composite projects
diff --git a/packages/wonder-stuff-core/tsconfig.json b/packages/wonder-stuff-core/tsconfig.json
index 8bebeb02..35cad7f7 100644
--- a/packages/wonder-stuff-core/tsconfig.json
+++ b/packages/wonder-stuff-core/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "exclude": ["dist", "**/*.flowtest.ts"],
+  "exclude": ["dist"],
   "extends": "../tsconfig-shared.json",
   "compilerOptions": {
     "outDir": "dist",
diff --git a/packages/wonder-stuff-i18n/tsconfig.json b/packages/wonder-stuff-i18n/tsconfig.json
index 8bebeb02..35cad7f7 100644
--- a/packages/wonder-stuff-i18n/tsconfig.json
+++ b/packages/wonder-stuff-i18n/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "exclude": ["dist", "**/*.flowtest.ts"],
+  "exclude": ["dist"],
   "extends": "../tsconfig-shared.json",
   "compilerOptions": {
     "outDir": "dist",
diff --git a/packages/wonder-stuff-sentry/tsconfig.json b/packages/wonder-stuff-sentry/tsconfig.json
index d74ddfac..d822c9f3 100644
--- a/packages/wonder-stuff-sentry/tsconfig.json
+++ b/packages/wonder-stuff-sentry/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "exclude": ["dist", "**/*.flowtest.ts"],
+  "exclude": ["dist"],
   "extends": "../tsconfig-shared.json",
   "compilerOptions": {
     "outDir": "dist",
diff --git a/packages/wonder-stuff-server-google/tsconfig.json b/packages/wonder-stuff-server-google/tsconfig.json
index 48645b9f..84e892ec 100644
--- a/packages/wonder-stuff-server-google/tsconfig.json
+++ b/packages/wonder-stuff-server-google/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "exclude": ["dist", "**/*.flowtest.ts"],
+  "exclude": ["dist"],
   "extends": "../tsconfig-shared.json",
   "compilerOptions": {
     "outDir": "dist",
diff --git a/packages/wonder-stuff-server/tsconfig.json b/packages/wonder-stuff-server/tsconfig.json
index cf71e9b2..aec43e53 100644
--- a/packages/wonder-stuff-server/tsconfig.json
+++ b/packages/wonder-stuff-server/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "exclude": ["dist", "**/*.flowtest.ts"],
+  "exclude": ["dist"],
   "extends": "../tsconfig-shared.json",
   "compilerOptions": {
     "outDir": "./dist",
diff --git a/packages/wonder-stuff-testing/tsconfig.json b/packages/wonder-stuff-testing/tsconfig.json
index 199bbc4e..2bd14567 100644
--- a/packages/wonder-stuff-testing/tsconfig.json
+++ b/packages/wonder-stuff-testing/tsconfig.json
@@ -1,5 +1,5 @@
 {
-  "extends": "../tsconfig-shared.json",
+  "exclude": ["dist"],
   "compilerOptions": {
     "outDir": "dist",
     "rootDir": "src",
diff --git a/tsconfig-build.json b/tsconfig-build.json
new file mode 100644
index 00000000..d567e5ee
--- /dev/null
+++ b/tsconfig-build.json
@@ -0,0 +1,14 @@
+/* Visit https://aka.ms/tsconfig to read more about this file */
+{
+  // Intentionally empty, all files are covered by tsconfig.json files
+  // in each package directory.
+  "files": [],
+  "references": [
+    {"path": "./packages/wonder-stuff-core"},
+    {"path": "./packages/wonder-stuff-i18n"},
+    {"path": "./packages/wonder-stuff-sentry"},
+    {"path": "./packages/wonder-stuff-server"},
+    {"path": "./packages/wonder-stuff-server-google"},
+    {"path": "./packages/wonder-stuff-testing"},
+  ]
+}
diff --git a/tsconfig.json b/tsconfig.json
index d567e5ee..654699e2 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,14 +1,33 @@
-/* Visit https://aka.ms/tsconfig to read more about this file */
 {
-  // Intentionally empty, all files are covered by tsconfig.json files
-  // in each package directory.
-  "files": [],
-  "references": [
-    {"path": "./packages/wonder-stuff-core"},
-    {"path": "./packages/wonder-stuff-i18n"},
-    {"path": "./packages/wonder-stuff-sentry"},
-    {"path": "./packages/wonder-stuff-server"},
-    {"path": "./packages/wonder-stuff-server-google"},
-    {"path": "./packages/wonder-stuff-testing"},
-  ]
+  "exclude": ["**/dist", "**/*.flowtest.ts"],
+  "compilerOptions": {
+    /* Visit https://aka.ms/tsconfig to read more about this file */
+
+    /* Language and Environment */
+    "target": "ES2016",
+
+    /* Modules */
+    "module": "ESNext",
+    "moduleResolution": "node",
+    "paths": {
+      "@khanacademy/*": ["./packages/*/src/index.ts"],
+    },
+
+    /* Emit */
+    "noEmit": true,
+
+    /* Interop Constraints */
+    "esModuleInterop": true,
+    "forceConsistentCasingInFileNames": true,
+
+    /* Type Checking */
+    "strict": true,
+    "noImplicitAny": true,
+    "allowUnusedLabels": false,
+    "allowUnreachableCode": false,
+
+    /* Completeness */
+    "skipDefaultLibCheck": true,
+    "skipLibCheck": false
+  }
 }