Cannot redeclare block-scoped variable

.mocharc.json

@@ -0,0 +1,8 @@
+{
+    "extensions": ["ts"],
+    "node-option": [
+      "loader=ts-node/esm"
+    ],
+    "require": "ts-node/register",
+    "spec": ["test/**/*-spec.ts"]
+  }

src/frames/frame.ts

@@ -1,5 +1,6 @@
+export {}
 import * as _ from 'lodash'
-import { MetaFrame, NilContext } from './meta-frame'
+import { MetaFrame, NilContext } from '../frames'
 
 export type Flags = { [key: string]: boolean; };
 

src/frames/meta-frame.ts

@@ -1,5 +1,5 @@
 import * as _ from 'lodash'
-import { Frame } from './frame'
+import { Frame } from '../frames'
 
 export interface ISourced extends Frame {
   source: string;

test/execute/eval-pipe-spec.ts

@@ -1,8 +1,6 @@
 import { expect } from 'chai'
 import {} from 'mocha'
 import { EvalPipe } from '../../src/execute/eval-pipe'
-import * as lex from '../../src/execute/lex-pipe'
-import * as parse from '../../src/execute/parse-pipe'
 import * as frame from '../../src/frames'
 
 describe('EvalPipe', () => {

tsconfig.json

@@ -1,13 +1,16 @@
 {
   "compilerOptions": {
-    "declaration": true,
+    "declaration": false,
+    "esModuleInterop": true,
+    "lib": ["es6"],
     "module": "commonjs",
     "target": "ESNext",
     "moduleResolution": "node",
-    "noImplicitAny": true,
+    "noImplicitAny": false,
     "outDir": "./lib",
     "preserveConstEnums": true,
     "removeComments": true,
+    "skipLibCheck": true,
   },
   "include": [
     "src/**/*.ts"