I have built new wheels for rasterio 1.1.1 here
which, for the first time, contain the base PROJ datum grids (version 1.8). This increases the size of the wheels by several MB and brings the installed size up to 52MB (on a Mac):
$ du rasterio
My question to the user community is: would you rather have heavier wheels with the base datum grids or lighter wheels without?
If consensus is for even more batteries included, I will give the new wheels a unique build tag, upload them to PyPI and then delete the existing 1.1.1 wheels. Some of you may notice warnings from your build tools about hash changes.