diff --git a/.idea/electron-builder.iml b/.idea/electron-builder.iml
index cdea3c1d2d5..81b7e41308e 100644
--- a/.idea/electron-builder.iml
+++ b/.idea/electron-builder.iml
@@ -26,6 +26,7 @@
       <excludeFolder url="file://$MODULE_DIR$/test/out" />
       <excludeFolder url="file://$MODULE_DIR$/test/vendor" />
       <excludePattern pattern="yarn.lock" />
+      <excludePattern pattern="scheme.json" />
     </content>
     <orderEntry type="inheritedJdk" />
     <orderEntry type="sourceFolder" forTests="false" />
diff --git a/docs/api/electron-builder-util.md b/docs/api/electron-builder-util.md
index 85390f97d3f..a28c3a4c6e7 100644
--- a/docs/api/electron-builder-util.md
+++ b/docs/api/electron-builder-util.md
@@ -94,6 +94,12 @@
 
 ### FileCopier
 **Kind**: class of [<code>electron-builder-util/out/fs</code>](#module_electron-builder-util/out/fs)  
+**Properties**
+
+| Name | Type |
+| --- | --- |
+| **isUseHardLink**| <code>Boolean</code> | 
+
 <a name="module_electron-builder-util/out/fs.FileCopier+copy"></a>
 
 #### `fileCopier.copy(src, dest, stat)` ⇒ <code>Promise&lt;void&gt;</code>
@@ -117,8 +123,8 @@ Hard links is used if supported and allowed.
 | --- | --- |
 | src | <code>String</code> | 
 | destination | <code>String</code> | 
-| filter | <code>module:electron-builder-util/out/fs.__type</code> | 
-| transformer | <code>module:electron-builder-util/out/fs.__type</code> | 
+| filter | <code>module:electron-builder-util/out/fs.__type</code> \| <code>null</code> | 
+| transformer | <code>module:electron-builder-util/out/fs.__type</code> \| <code>null</code> | 
 | isUseHardLink | <code>callback</code> | 
 
 <a name="module_electron-builder-util/out/fs.copyFile"></a>
diff --git a/package.json b/package.json
index 685d90674d8..1860018c06e 100644
--- a/package.json
+++ b/package.json
@@ -18,7 +18,7 @@
     "update-deps": "node ./packages/update-deps.js",
     "set-versions": "node test/out/helpers/setVersions.js",
     "npm-publish": "yarn set-versions && yarn compile && ./packages/npm-publish.sh && conventional-changelog -p angular -i CHANGELOG.md -s",
-    "schema": "typescript-json-schema packages/electron-builder/tsconfig.json Config --out packages/electron-builder/scheme.json --noExtraProps --useTypeOfKeyword --strictNullChecks --titles",
+    "schema": "typescript-json-schema packages/electron-builder/tsconfig.json Config --out packages/electron-builder/scheme.json --noExtraProps --useTypeOfKeyword --strictNullChecks --titles --required",
     "jsdoc": "ts2jsdoc packages/electron-builder-http packages/electron-updater packages/electron-builder-util packages/electron-builder packages/electron-builder-core packages/electron-publish",
     "jsdoc2md": "node packages/jsdoc2md.js",
     "api": "node ./test/vendor/yarn.js jsdoc && node ./test/vendor/yarn.js jsdoc2md"
@@ -81,7 +81,7 @@
     "convert-source-map": "^1.5.0",
     "decompress-zip": "^0.3.0",
     "depcheck": "^0.6.7",
-    "develar-typescript-json-schema": "0.11.0",
+    "develar-typescript-json-schema": "0.13.3",
     "env-paths": "^1.0.0",
     "globby": "^6.1.0",
     "jest-cli": "^20.0.4",
diff --git a/packages/electron-builder-util/src/fs.ts b/packages/electron-builder-util/src/fs.ts
index fb93f9d4c51..50a72960f00 100644
--- a/packages/electron-builder-util/src/fs.ts
+++ b/packages/electron-builder-util/src/fs.ts
@@ -159,9 +159,10 @@ export function copyOrLinkFile(src: string, dest: string, stats?: Stats | null,
 }
 
 export class FileCopier {
-  private isUseHardLink = _isUseHardLink
+  isUseHardLink: boolean
   
-  constructor(private readonly isUseHardLinkFunction?: (file: string) => boolean, private readonly transformer?: FileTransformer) {
+  constructor(private readonly isUseHardLinkFunction?: (file: string) => boolean, private readonly transformer?: FileTransformer | null) {
+    this.isUseHardLink = _isUseHardLink && isUseHardLinkFunction !== DO_NOT_USE_HARD_LINKS
   }
 
   async copy(src: string, dest: string, stat: Stats | undefined) {
@@ -203,13 +204,14 @@ export class FileCopier {
  * Empty directories is never created.
  * Hard links is used if supported and allowed.
  */
-export function copyDir(src: string, destination: string, filter?: Filter, transformer?: FileTransformer, isUseHardLink?: (file: string) => boolean): Promise<any> {
+export function copyDir(src: string, destination: string, filter?: Filter | null, transformer?: FileTransformer | null, isUseHardLink?: (file: string) => boolean): Promise<any> {
+  const fileCopier = new FileCopier(isUseHardLink, transformer)
+
   if (debug.enabled) {
-    debug(`Copying ${src} to ${destination}${_isUseHardLink ? " using hard links" : ""}`)
+    debug(`Copying ${src} to ${destination}${fileCopier.isUseHardLink ? " using hard links" : ""}`)
   }
 
   const createdSourceDirs = new Set<string>()
-  const fileCopier = new FileCopier(isUseHardLink, transformer)
   const links: Array<Link> = []
   return walk(src, filter, async(file, stat, parent) => {
     if (!stat.isFile() && !stat.isSymbolicLink()) {
@@ -232,6 +234,8 @@ export function copyDir(src: string, destination: string, filter?: Filter, trans
     .then(() => BluebirdPromise.map(links, it => symlink(it.link, it.file), CONCURRENCY))
 }
 
+export const DO_NOT_USE_HARD_LINKS = (file: string) => false
+
 interface Link {
   readonly link: string,
   readonly file: string
diff --git a/packages/electron-builder/src/packager.ts b/packages/electron-builder/src/packager.ts
index 2b4be393491..9634a0bd1a4 100644
--- a/packages/electron-builder/src/packager.ts
+++ b/packages/electron-builder/src/packager.ts
@@ -255,8 +255,12 @@ export class Packager implements BuildInfo {
         const targetList = createTargets(nameToTarget, targetNames.length === 0 ? packager.defaultTarget : targetNames, outDir, packager, cleanupTasks)
         const ourDirs = new Set<string>()
         for (const target of targetList) {
-          const outDir = target.outDir
-          if (!createdOutDirs.has(outDir) && !(target instanceof NoOpTarget)) {
+          if (target instanceof NoOpTarget) {
+            continue
+          }
+
+          const outDir = (<Target>target).outDir
+          if (createdOutDirs.has(outDir)) {
             ourDirs.add(outDir)
           }
         }
diff --git a/packages/electron-builder/src/packager/dirPackager.ts b/packages/electron-builder/src/packager/dirPackager.ts
index 7fb797b454c..f76a9bde598 100644
--- a/packages/electron-builder/src/packager/dirPackager.ts
+++ b/packages/electron-builder/src/packager/dirPackager.ts
@@ -1,7 +1,7 @@
 import { path7za } from "7zip-bin"
 import BluebirdPromise from "bluebird-lst"
 import { debug7zArgs, spawn } from "electron-builder-util"
-import { copyDir } from "electron-builder-util/out/fs"
+import { copyDir, DO_NOT_USE_HARD_LINKS } from "electron-builder-util/out/fs"
 import { log, warn } from "electron-builder-util/out/log"
 import { chmod, emptyDir } from "fs-extra-p"
 import * as path from "path"
@@ -61,7 +61,7 @@ async function unpack(packager: PlatformPackager<any>, out: string, platform: st
     const destination = packager.getElectronDestDir(out)
     log(`Copying Electron from "${source}" to "${destination}"`)
     await emptyDir(out)
-    await copyDir(source, destination)
+    await copyDir(source, destination, null, null, DO_NOT_USE_HARD_LINKS)
   }
 
   if (platform === "linux") {
diff --git a/packages/jsdoc2md.js b/packages/jsdoc2md.js
index 2d62dd9aa08..1102dc1bc5c 100644
--- a/packages/jsdoc2md.js
+++ b/packages/jsdoc2md.js
@@ -49,7 +49,6 @@ async function main() {
 
   const developerFiles = (await globby([
     "builder/**/*.js",
-    "!**/*-dirPackager.js",
     "!***/*-asarUtil.js",
     "!***/*-fileMatcher.js",
     "!***/*-fileTransformer.js",
diff --git a/typings/yargs.d.ts b/typings/yargs.d.ts
index 543df9c10a9..63886831bc9 100644
--- a/typings/yargs.d.ts
+++ b/typings/yargs.d.ts
@@ -127,7 +127,7 @@ declare namespace yargs {
 
     completion(cmd: string, fn?: SyncCompletionFunction): Yargs;
 
-    completion(cmd: string, description?: string, fn?: AsyncCompletionFunction): Yargs;
+    completion(cmd: string | undefined, description?: string, fn?: AsyncCompletionFunction): Yargs;
 
     completion(cmd: string, description?: string, fn?: SyncCompletionFunction): Yargs;
 
diff --git a/yarn.lock b/yarn.lock
index a80310831bd..d152e2ef320 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -1013,14 +1013,14 @@ detect-newline@^1.0.3:
     get-stdin "^4.0.1"
     minimist "^1.1.0"
 
-develar-typescript-json-schema@0.11.0:
-  version "0.11.0"
-  resolved "https://registry.yarnpkg.com/develar-typescript-json-schema/-/develar-typescript-json-schema-0.11.0.tgz#d73580cae2fb0b8f9a7cee3d10aff6caae751cca"
+develar-typescript-json-schema@0.13.3:
+  version "0.13.3"
+  resolved "https://registry.yarnpkg.com/develar-typescript-json-schema/-/develar-typescript-json-schema-0.13.3.tgz#c3accb60ebdcdf4ee711adbd6c194167debf5939"
   dependencies:
-    glob "~7.1.1"
+    glob "~7.1.2"
     json-stable-stringify "^1.0.1"
-    typescript "~2.1.5"
-    yargs "^7.0.2"
+    typescript "~2.3.0"
+    yargs "^8.0.1"
 
 diff@^3.2.0:
   version "3.2.0"
@@ -1368,7 +1368,7 @@ glob-parent@^2.0.0:
   dependencies:
     is-glob "^2.0.0"
 
-glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.1.0, glob@^7.1.1, glob@~7.1.1:
+glob@^7.0.0, glob@^7.0.3, glob@^7.0.5, glob@^7.1.0, glob@^7.1.1, glob@~7.1.2:
   version "7.1.2"
   resolved "https://registry.yarnpkg.com/glob/-/glob-7.1.2.tgz#c19c9df9a028702d678612384a6552404c636d15"
   dependencies:
@@ -3353,9 +3353,9 @@ typescript@next:
   version "2.5.0-dev.20170614"
   resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.5.0-dev.20170614.tgz#eb77ed212a5e49ebc8392ba0a95713ef87d9f6f1"
 
-typescript@~2.1.5:
-  version "2.1.6"
-  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.1.6.tgz#40c7e6e9e5da7961b7718b55505f9cac9487a607"
+typescript@~2.3.0:
+  version "2.3.4"
+  resolved "https://registry.yarnpkg.com/typescript/-/typescript-2.3.4.tgz#3d38321828231e434f287514959c37a82b629f42"
 
 typical@^2.4.2, typical@^2.6.0, typical@^2.6.1:
   version "2.6.1"
@@ -3715,7 +3715,7 @@ yargs@^7.0.2:
     y18n "^3.2.1"
     yargs-parser "^5.0.0"
 
-yargs@^8.0.2:
+yargs@^8.0.1, yargs@^8.0.2:
   version "8.0.2"
   resolved "https://registry.yarnpkg.com/yargs/-/yargs-8.0.2.tgz#6299a9055b1cefc969ff7e79c1d918dceb22c360"
   dependencies: