title: build error mono 3.4.0 centos
body: <p>get source from downloads</p>
  
  <p>make &amp;&amp; make install</p>
  
  <pre><code>mkdir -p -- /usr/lib/mono/xbuild/Microsoft/Portable/v4.0
  /usr/bin/install -c -c -m 644 targets/Microsoft.Portable.Common.targets /usr/lib/mono/xbuild/Microsoft/Portable/v4.0/Microsoft.Portable.Common.targets
  /usr/bin/install: cannot stat `targets/Microsoft.Portable.Common.targets': No such file or directory
  </code></pre>