==> Installing postgis dependency: numpy
==> Downloading https:==> Pouring numpy-1.15.1.sierra.bottle.tar.gz
Error: The `brew link` step did not complete successfully
The formula built, but is not symlinked into /usr/local
Could not symlink lib/python2.7/site-packages/numpy/__config__.py
Target /usr/local/lib/python2.7/site-packages/numpy/__config__.py
already exists. You may want to remove it:
rm '/usr/local/lib/python2.7/site-packages/numpy/__config__.py'
To force the link and overwrite all conflicting files:
brew link --overwrite numpy
To list all files that would be deleted:
brew link --overwrite --dry-run numpy