Be careful with the sources for the installation of Airflow, as some might not be up to date. At this stage, this applies to some conda packages that are available.
At the time of writing, the best approach is probably to use a standard Python installation that either comes with your OS or from http://www.python.org. Anaconda Python is not recommended at this stage.
That being said, with time, things might change. Please check Airflow's documentation. Only Step 1 in the following section is dependent on the assumption that you are using "old-fashioned" tools for installation.
More detailed installation instructions can be found in Airflow's documentation.
