title: Failed to resolve: com.android.support:appcompat-v7:21.0.1
body: <p>I recently changed my mindSdkVersion to 17 and targetSdkVersion to 21, and got lots of errors. I fixed some of them, but I can't fix this one:</p>
  
  <pre><code>Error:(28, 13) Failed to resolve: com.android.support:appcompat-v7:21.0.1
  </code></pre>
  
  <p>I'm using Android Studio on Mac and I have Android Support repositories. </p>
  
  <p>My build.gradle file:</p>
  
  <pre><code>apply plugin: 'com.android.application'
  
  
  android {
      compileSdkVersion 21
      buildToolsVersion "24.0.3"
      defaultConfig {
          applicationId "com.swit.sedamaker"
          minSdkVersion 17
          targetSdkVersion 21
          versionCode 2
          versionName "1.01"
          testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
      }
      buildTypes {
          release {
              minifyEnabled false
              proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
          }
      }
      productFlavors {
      }
  }
  
  dependencies {
  
      compile 'com.android.support:appcompat-v7:21.0.1'
  
      compile fileTree(include: ['*.jar'], dir: 'libs')
      androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
          exclude group: 'com.android.support', module: 'support-annotations'
      })
  
      testCompile 'junit:junit:4.12'
  }
  </code></pre>