diff --git a/build.gradle b/build.gradle
--- a/build.gradle
+++ b/build.gradle
@@ -1,5 +1,5 @@
 plugins {
-  id "org.implab.gradle-typescript" version "1.1.1"
+  id "org.implab.gradle-typescript" version "1.3.0"
   id "org.implab.gradle-hg"
   id "ivy-publish"
 }
@@ -70,10 +70,6 @@ typescript {
 	esLintCmd = "$projectDir/node_modules/.bin/eslint"
 }
 
-npm {
-    npmCmd = "npm"
-}
-
 tasks.matching{ it.name =~ /^lint/ }.configureEach {
     onlyIf { lint }
 }
@@ -98,12 +94,6 @@ task printVersion {
     }
 }
 
-task clean {
-    doLast {
-        delete buildDir
-    }
-}
-
 npmPackMeta {
     meta {
         name = packageName