newbie Centos7 install


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Just Got Here
Hi Forum.
Sorry to say that I'm a complete newbie with all this rpm installs.
I've followed the instructions on the site:
sudo yum -y install http://download.fedoraproject.org/pub/epel/6/x86_64/epel-release-6-8.noarch.rpm
sudo yum update
sudo yum install nwchem-openmpi.x86_64

then I setup the env variables.
I've created a $NWCHEM_TOP/src folder

But what am I missing here as this does not work:

make nwchem_config NWCHEM_MODULES="all python"
make: *** No rule to make target `nwchem_config'. Stop.

thoughts, or comments are very welcome !
cheers,
Mikemp