Adding some requisites to the README file, necessary for deployment o…

…n plain vanilla Amazon Linux on EC2, for instance.
KQED · Jul 26, 2017 · e68fac6 · e68fac6
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commit e68fac6
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diff --git a/README.md b/README.md
@@ -36,6 +36,7 @@ and an AWS account that is configured on your system to be ready to use with the
 
 ## How to install
 
+      > sudo yum install -y gcc libffi-devel openssl-devel               # Make sure some prerequisites are installed.
       > virtualenv env                                                   # Create a Python virtual environment.
       > cd env; . ./bin/activate                                         # Activate the Python virtual environment.
       > git clone https://github.com/awslabs/sync-buckets-state-machine  # Clone the software from this Git repository.