title: Relative path in build.gradle differs between Windows and OS X
body: <p>My project have a folder with the keystore file (file.keystore). This is the structure:</p>
  
  <pre><code>+---.gradle
  |   \---2.2
  |       \---taskArtifacts
  +---.idea
  |   +---copyright
  |   \---libraries
  +---app
  |   +---build
  |   |   +---generated
  |   +---libs
  |   \---src
  |       +---androidTest
  |       \---main
  +---build
  |   \---intermediates
  |       \---dex-cache
  +---gradle
  |   \---wrapper
  \---keystore
  </code></pre>
  
  <p>To use it in build.gradle I use this:</p>
  
  <pre><code>signingConfigs {
      project {
          keyAlias 'project'
          keyPassword 'blabla'
          storeFile file('keystore\\file.keystore')
          storePassword 'blabla'
      }
  </code></pre>
  
  <p>In windows everything is correct because it searches in: </p>
  
  <p>/project/keystore/file.keystore </p>
  
  <p>But in OS X it is searching in:</p>
  
  <p>/project/app/keystore/file.keystore</p>
  
  <p>How should I code in the build.gradle? </p>