working thing

packages/main/tsconfig.json

@@ -4,16 +4,20 @@
     "noImplicitAny": true,
     "noEmitOnError": true,
     "noUnusedLocals": true,
-    "strictNullChecks": true,
     "module": "commonjs",
     "moduleResolution": "node",
     "target": "ES5",
     "outDir": "./build",
     "lib": ["ES5", "ES2015.Collection", "ES2015.Promise", "DOM"],
     "types": ["node"],
-    "baseUrl": "..",
+    "baseUrl": ".",
     "paths": {
-      "@jupyterlab/*": ["*"]
-    }
-  }
+      "@jupyterlab/*": ["../*/src"]
+    },
+    "rootDirs": [
+      ".."
+    ]
+  },
+  "include": ["src/*", "../packages/**/src/*"],
+  "exclude": ["node_modules/@jupyterlab/*"]
 }