diff --git a/src/packager.ts b/src/packager.ts
index c04a8c8d695..3b98d818cd2 100644
--- a/src/packager.ts
+++ b/src/packager.ts
@@ -58,20 +58,30 @@ export class Packager implements BuildInfo {
   async build(): Promise<Map<Platform, Map<String, Target>>> {
     const devPackageFile = this.devPackageFile
 
+    const extraMetadata = this.options.extraMetadata
+
     this.devMetadata = deepAssign(await readPackageJson(devPackageFile), this.options.devMetadata)
     this.appDir = await computeDefaultAppDirectory(this.projectDir, use(this.devMetadata.directories, it => it!.app))
 
     this.isTwoPackageJsonProjectLayoutUsed = this.appDir !== this.projectDir
 
-    const appPackageFile = this.projectDir === this.appDir ? devPackageFile : path.join(this.appDir, "package.json")
-    if (appPackageFile === devPackageFile) {
-      if (this.options.appMetadata != null) {
-        this.devMetadata = deepAssign(this.devMetadata, this.options.appMetadata)
+    const appPackageFile = this.isTwoPackageJsonProjectLayoutUsed ? path.join(this.appDir, "package.json") : devPackageFile
+    if (this.isTwoPackageJsonProjectLayoutUsed) {
+      if (extraMetadata != null && extraMetadata.build != null) {
+        deepAssign(this.devMetadata, {build: extraMetadata.build})
+        delete extraMetadata.build
       }
-      this.metadata = <any>this.devMetadata
+
+      this.metadata = deepAssign(await readPackageJson(appPackageFile), this.options.appMetadata, extraMetadata)
     }
     else {
-      this.metadata = deepAssign(await readPackageJson(appPackageFile), this.options.appMetadata)
+      if (this.options.appMetadata != null) {
+        deepAssign(this.devMetadata, this.options.appMetadata)
+      }
+      if (extraMetadata != null) {
+        deepAssign(this.devMetadata, extraMetadata)
+      }
+      this.metadata = <any>this.devMetadata
     }
 
     this.checkMetadata(appPackageFile, devPackageFile)
diff --git a/test/src/BuildTest.ts b/test/src/BuildTest.ts
index d7c6097748c..24da7740502 100755
--- a/test/src/BuildTest.ts
+++ b/test/src/BuildTest.ts
@@ -216,7 +216,8 @@ test.ifDevOrLinuxCi("extra metadata", () => {
   const extraMetadata = {
     foo: {
       bar: 12,
-    }
+    },
+    productName: "NewName"
   }
   return assertPack("test-app-one", {
     targets: Platform.LINUX.createTarget(DIR_TARGET),
@@ -228,18 +229,53 @@ test.ifDevOrLinuxCi("extra metadata", () => {
         existingProp: 22,
       }
     }),
-    packed: projectDir => {
-      assertThat(JSON.parse(extractFile(path.join(projectDir, "dist", "linux", "resources", "app.asar"), "package.json").toString())).hasProperties({
+    packed: async (projectDir) => {
+      const out = path.join(projectDir, "dist", "linux")
+      await assertThat(path.join(out, "NewName")).isFile()
+      assertThat(JSON.parse(extractFile(path.join(out, "resources", "app.asar"), "package.json").toString())).hasProperties({
         foo: {
           bar: 12,
           existingProp: 22,
         }
       })
-      return BluebirdPromise.resolve()
     }
   })
 })
 
+test.ifDevOrLinuxCi("extra metadata - two", () => {
+  const extraMetadata = {
+    productName: "NewName"
+  }
+  return assertPack("test-app", {
+    targets: Platform.LINUX.createTarget(DIR_TARGET),
+    extraMetadata: extraMetadata,
+  }, {
+    packed: async (projectDir) => {
+      const out = path.join(projectDir, "dist", "linux")
+      await assertThat(path.join(out, "NewName")).isFile()
+    }
+  })
+})
+
+test.ifOsx("extra metadata - override icon", t => t.throws((() => {
+  const extraMetadata = {
+    build: {
+      mac: {
+        icon: "dev"
+      }
+    },
+  }
+  return assertPack("test-app", {
+    targets: Platform.OSX.createTarget(DIR_TARGET),
+    extraMetadata: extraMetadata,
+  }, {
+    packed: async (projectDir) => {
+      const out = path.join(projectDir, "dist", "linux")
+      await assertThat(path.join(out, "NewName")).isFile()
+    }
+  })
+})(), /ENOENT: no such file or directory/))
+
 test.ifOsx("app-executable-deps", () => {
   return assertPack("app-executable-deps", {
     targets: Platform.current().createTarget(DIR_TARGET),
@@ -275,7 +311,7 @@ test.ifDevOrLinuxCi("smart unpack", () => {
   })
 })
 
-test.ifWinCi("Build MacOS on Windows is not supported", (t: any) => t.throws(assertPack("test-app-one", platform(Platform.MAC)), /Build for MacOS is supported only on MacOS.+/))
+test.ifWinCi("Build MacOS on Windows is not supported", t => t.throws(assertPack("test-app-one", platform(Platform.MAC)), /Build for MacOS is supported only on MacOS.+/))
 
 function allPlatforms(dist: boolean = true): PackagerOptions {
   return {