title: Failed igraph installation on a Ubuntu box
body: <p>I tried installing igraph using easy_install, and received a message to contact the package's author or the easy_install maintainers. Knowing that igraph has a pretty active community in SO, I am pasting the message below:</p>
  
  <pre><code>sudo easy_install python-igraph
  Searching for python-igraph
  Reading https://pypi.python.org/simple/python-igraph/
  Best match: python-igraph 0.7.1-2
  Downloading https://pypi.python.org/packages/source/p/python-igraph/python-igraph-0.7.1-2.tar.gz#md5=4b1f4dc621fc938434836e59dea31173
  Processing python-igraph-0.7.1-2.tar.gz
  Writing /tmp/easy_install-R2pEQ_/python-igraph-0.7.1-2/setup.cfg
  Running python-igraph-0.7.1-2/setup.py -q bdist_egg --dist-dir /tmp/easy_install-R2pEQ_/python-igraph-0.7.1-2/egg-dist-tmp-bl3Z_7
  Cannot find the C core of igraph on this system using pkg-config.
  We will now try to download and compile the C core from scratch.
  Version number of the C core: 0.7.1-2
  We will also try: 0.7.1
  
  error: Setup script exited with error: SandboxViolation: mkdir('/usr/local/bin/tmp', 511) {}
  
  The package setup script has attempted to modify files on your system
  that are not within the EasyInstall build area, and has been aborted.
  
  This package cannot be safely installed by EasyInstall, and may not
  support alternate installation locations even if you run its setup
  script by hand.  Please inform the package's author and the EasyInstall
  maintainers to find out if a fix or workaround is available.
  </code></pre>
  
  <p>My machine already has C/C++. Any help much appreciated.</p>