typeRoots are not resolved when types are present

.gitignore

@@ -1 +1,2 @@
 node_modules
+dist

package.json

@@ -1,6 +1,14 @@
 {
   "dependencies": {
     "ts-node": "latest",
-    "typescript": "latest"
+    "typescript": "latest",
+    "dnscache": "1.0.2",
+    "@types/node": "latest"
+  },
+  "scripts": {
+    "start": "node dist/index.js",
+    "ts-node": "ts-node src/index.ts",
+    "ts-node--files": "ts-node --files src/index.ts",
+    "tsc": "tsc"
   }
 }

run.sh

@@ -4,10 +4,10 @@
 n lts
 
 # Install package.json dependencies
-yarn
+npm i
 
 # Run ts-node
-yarn ts-node ./example.ts
+npm run ts-node
 
 echo "Process exited with code: $?"
 echo

src/index.ts

@@ -0,0 +1,5 @@
+import dnscache from 'dnscache';
+
+dnscache({});
+
+console.log('done');

src/typings/dnscache/index.d.ts

@@ -0,0 +1,17 @@
+declare module 'dnscache' {
+  export default function dnscache(conf: {
+    enable?: boolean;
+    ttl?: number;
+    cachesize?: number;
+  }): void;
+}
+
+// declare module 'dnscache' {
+//   function dnscache(conf: {
+//     enable?: boolean;
+//     ttl?: number;
+//     cachesize?: number;
+//   }): void;
+//
+//   export = dnscache;
+// }

tsconfig.json

@@ -0,0 +1,12 @@
+{
+  "compilerOptions": {
+    "strict": true,
+    "esModuleInterop": true,
+    "outDir": "dist",
+    "types": ["node"],
+    "typeRoots": [
+      "node_modules/@types",
+      "src/typings"
+    ]
+  }
+}