title: Path conflict in Qt Creator
body: <p>On building a project on Qt Creator, I get an error:</p>
  
  <pre><code>Failure to read QMAKESPEC conf file /usr/share/qt4/mkspecs/linux-g++/qmake.conf.
  Error processing project file: /path/to/my/project/directory/project.pro
  01:13:32: The process "/usr/bin/qmake-qt4" exited with code 3.
  Error while building/deploying project converter (kit: Qt 4.8.4 in PATH (System))
  When executing step 'qmake'
  </code></pre>
  
  <p>But when I executed</p>
  
  <pre><code>locate qmake.conf
  </code></pre>
  
  <p>on terminal, I found that the file was located at</p>
  
  <pre><code>/usr/lib64/qt4/mkspecs/linux-g++/qmake.conf
  </code></pre>
  
  <p>How do I configure Qt Creator to consider the correct path?</p>