diff --git a/.vscode/launch.json b/.vscode/launch.json
index e1acee5270f195..54492d339f4cb8 100644
--- a/.vscode/launch.json
+++ b/.vscode/launch.json
@@ -209,9 +209,7 @@
       "args": ["build"],
       "cwd": "${workspaceRoot}/packages/fluentui/react-northstar",
       "env": {
-        "NODE_ENV": "development",
-        // This is used in scripts/babel/index.js to enable sourcemaps
-        "DEBUG": "1"
+        "NODE_ENV": "development"
       },
       "sourceMaps": true,
       "console": "integratedTerminal"
diff --git a/scripts/ts-node-register.js b/scripts/ts-node-register.js
index 0e07abb27540e2..dfd85e1013b25e 100644
--- a/scripts/ts-node-register.js
+++ b/scripts/ts-node-register.js
@@ -1,7 +1,6 @@
 const tsNode = require('ts-node');
-const jju = require('jju');
-const fs = require('fs');
 const path = require('path');
+const { readConfig } = require('./read-config');
 
 // Until ts-node re-enables caching, we're using version 7 (before caching was disabled).
 // https://github.com/TypeStrong/ts-node/issues/951
@@ -12,6 +11,9 @@ tsNode.register({
   // // Register ts-node so that it uses the scripts directory's tsconfig
   // dir: __dirname,
   // Hack to work around lack of `dir` option: manually pass in tsconfig
-  compilerOptions: jju.parse(fs.readFileSync(path.join(__dirname, 'tsconfig.json'))).compilerOptions,
+  compilerOptions: {
+    ...readConfig(path.join(__dirname, 'typescript/tsconfig.common.json')).compilerOptions,
+    ...readConfig(path.join(__dirname, 'tsconfig.json')).compilerOptions,
+  },
   skipProject: true, // don't read tsconfig within ts-node
 });