Correct Installation of XGBoost on AWS EC2 Instance

I have installed XGBoost on an AWS EC2 instance, as follows:

     sudo yum update

     sudo yum -y install gcc-c++ python27-devel atlas-sse3-devel lapack-devel
     wget https://pypi.python.org/packages/source/v/virtualenv/virtualenv-1.11.2.tar.gz
     tar xzf virtualenv-1.11.2.tar.gz 
     python27 virtualenv-1.11.2/virtualenv.py sk-lea
     . sk-lea/bin/activate

     pip install numpy
     pip install scipy
     pip install --upgrade pip
     pip install -U scikit-lea
     pip install boto
     pip install pandas
     sudo yum groupinstall "Development Tools"
     sudo yum install python-setuptools


     git clone --recursive https://github.com/dmlc/xgboost
     cd xgboost; make -j4
     cd python-package
     sudo python setup.py install 

However, the last line results in the follow error:

ImportError: No module named numpy.distutils.core

What is the source of this error and what is the correct procedure? Thanks.