Install postgis-2.3.2 with [email protected]

gistfile1.txt

brew install https://raw.githubusercontent.com/Homebrew/homebrew-core/aa049a47b218fda30f9a4a454119ae067a02cf50/Formula/postgis.rb

#pg_config --pkglibdir is useful for finding your $libdir
cp -a /usr/local/share/postgresql/extension/postgis* /usr/local/Cellar/[email protected]/9.6.5/share/[email protected]/extension/
cp -a /usr/local/lib/postgresql/postgis-2.3.so /usr/local/Cellar/[email protected]/9.6.5/lib/postgis-2.3
cp -a /usr/local/lib/postgresql/rtpostgis-2.3.so /usr/local/Cellar/[email protected]/9.6.5/lib/

Trying to install PostGIS to work with existing Postgres 9.6. The above installed PostgreSQL 11.1, and failed to install PostGIS. Got this:

==> Pouring postgis-2.3.2.high_sierra.bottle.tar.gz
Error: undefined method `undent' for #<String:0x00007f80feb5d228>
Please report this bug:
  https://docs.brew.sh/Troubleshooting
/Users/khommel/Library/Caches/Homebrew/Formula/postgis.rb:132:in `caveats'
/usr/local/Homebrew/Library/Homebrew/caveats.rb:17:in `caveats'
/System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib/ruby/2.3.0/forwardable.rb:202:in `empty?'
/usr/local/Homebrew/Library/Homebrew/formula_installer.rb:613:in `caveats'
/usr/local/Homebrew/Library/Homebrew/formula_installer.rb:664:in `finish'
/usr/local/Homebrew/Library/Homebrew/cmd/install.rb:330:in `install_formula'
/usr/local/Homebrew/Library/Homebrew/cmd/install.rb:259:in `block in install'
/usr/local/Homebrew/Library/Homebrew/cmd/install.rb:257:in `each'
/usr/local/Homebrew/Library/Homebrew/cmd/install.rb:257:in `install'
/usr/local/Homebrew/Library/Homebrew/brew.rb:89:in `<main>'