For those who want to install Airflow 1.10.* today and failing. Please check your PIP version.
PIP 20.3 was released yesterday (https://pip.pypa.io/en/stable/news/) and it contains a new resolver that might break installation for older versions of Airflow. The solution (for now) is to downgrade to 20.2.4 before installing Airflow: pip install --upgrade pip==20.2.4 Our Dockerfiles (both for 2.0 and upcoming 1.10.14) will have pip pinned to 2.20.4 for now: https://github.com/apache/airflow/pull/12738 I have also managed to get non-conflicting dependencies a few days ago for both 2.0 and 1.10 and while I had problems with the new resolver when I tested it in the old PIP I will try to make it works. Hopefully, both 2.0 and the upcoming 1.10.14 will work with the new pip. Thank you for your understanding! J. -- Jarek Potiuk Polidea <https://www.polidea.com/> | Principal Software Engineer M: +48 660 796 129 <+48660796129> [image: Polidea] <https://www.polidea.com/>