Cannot add buildConfigField in productFlavors

In my android{} section I tried to put two different build types for may free and paid app. Sadly I'm getting gradle error: Gradle 'android-Transport' project refresh failed: Build script error, unsupported Gradle DSL method found: 'buildConfigField()'! Possible causes could be: - you are using Gradle version where the method is absent - you didn't apply Gradle plugin which provides the method - or there is a mistake in a build script This is my android{} section in gradle build: ``` android { compileSdkVersion 19 buildToolsVersion "19.0.3" defaultConfig { minSdkVersion 10 targetSdkVersion 19 versionCode 1 versionName "1.0" } compileOptions { sourceCompatibility JavaVersion.VERSION_1_6 targetCompatibility JavaVersion.VERSION_1_6 } buildTypes { release { runProguard true proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.txt' } debug { debuggable true runProguard false } } productFlavors { free { packageName "pl.grzeslowski.transport.free" buildConfigField "transport.product_flavors.MonetizationType" "MONETIAZATION_TYPE" "transport.product_flavors.MonetizationType.FREE" } paid { packageName "pl.grzeslowski.transport.paid" buildConfigField "transport.product_flavors.MonetizationType" "MONETIAZATION_TYPE" "transport.product_flavors.MonetizationType.PAID" } } } ``` And this is my console log: Executing tasks: [:transport:compileDebugJava] Configuration on demand is an incubating feature. Download http://repo1.maven.org/maven2/com/android/tools/build/gradle/0.8.3/gradle-0.8.3.pom Download http://repo1.maven.org/maven2/com/android/tools/lint/lint/22.5.3/lint-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/build/builder/0.8.3/builder-0.8.3.pom Download http://repo1.maven.org/maven2/com/android/tools/lint/lint-checks/22.5.3/lint-checks-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/sdklib/22.5.3/sdklib-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/ddms/ddmlib/22.5.3/ddmlib-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/build/builder-model/0.8.3/builder-model-0.8.3.pom Download http://repo1.maven.org/maven2/com/android/tools/build/manifest-merger/22.5.3/manifest-merger-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/sdk-common/22.5.3/sdk-common-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/build/builder-test-api/0.8.3/builder-test-api-0.8.3.pom Download http://repo1.maven.org/maven2/com/android/tools/common/22.5.3/common-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/lint/lint-api/22.5.3/lint-api-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/dvlib/22.5.3/dvlib-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/layoutlib/layoutlib-api/22.5.3/layoutlib-api-22.5.3.pom Download http://repo1.maven.org/maven2/com/android/tools/build/gradle/0.8.3/gradle-0.8.3.jar Download http://repo1.maven.org/maven2/com/android/tools/lint/lint/22.5.3/lint-22.5.3.jar Download http://repo1.maven.org/maven2/com/android/tools/build/builder/0.8.3/builder-0.8.3.jar Download http://repo1.maven.org/maven2/com/android/tools/lint/lint-checks/22.5.3/lint-checks-22.5.3.jar FAILURE: Build failed with an exception. Where: Build file 'D:\Programowanie\GitProjects\transport\android-Transport\transport\build.gradle' line: 77 What went wrong: A problem occurred evaluating project ':transport'. Could not find method buildConfigField() for arguments [transport.product_flavors.MonetizationType] on GroupableProductFlavorDsl_Decorated{name=free, minSdkVersion=-1, targetSdkVersion=-1, renderscriptTargetApi=-1, renderscriptSupportMode=null, renderscriptNdkMode=null, versionCode=-1, versionName=null, packageName=transport.free, testPackageName=null, testInstrumentationRunner=null, testHandleProfiling=null, testFunctionalTest=null, signingConfig=null, resConfig=null}. Try: Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. BUILD FAILED Total time: 9.781 secs