PG::UndefinedFile: ERROR: could not open extension control file

Question

After upgrading Postgres i am getting the following error when i try to migrate the database.

enable_extension(:postgis)
  SQL (17.2ms)  CREATE EXTENSION IF NOT EXISTS "postgis"
PG::UndefinedFile: ERROR:  could not open extension control file "/usr/local/Cellar/postgresql/9.4.5/share/postgresql/extension/postgis.control": No such file or directory
: CREATE EXTENSION IF NOT EXISTS "postgis"
   (0.3ms)  ROLLBACK
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:

PG::UndefinedFile: ERROR:  could not open extension control file "/usr/local/Cellar/postgresql/9.4.5/share/postgresql/extension/postgis.control": No such file or directory
: CREATE EXTENSION IF NOT EXISTS "postgis"/Users/harshamv/Sites/clink/db/migrate/20150812164615_enable_postgis.rb:3:in `change'
-e:1:in `<main>'
ActiveRecord::StatementInvalid: PG::UndefinedFile: ERROR:  could not open extension control file "/usr/local/Cellar/postgresql/9.4.5/share/postgresql/extension/postgis.control": No such file or directory
: CREATE EXTENSION IF NOT EXISTS "postgis"
/Users/harshamv/Sites/clink/db/migrate/20150812164615_enable_postgis.rb:3:in `change'
-e:1:in `<main>'
PG::UndefinedFile: ERROR:  could not open extension control file "/usr/local/Cellar/postgresql/9.4.5/share/postgresql/extension/postgis.control": No such file or directory
/Users/harshamv/Sites/clink/db/migrate/20150812164615_enable_postgis.rb:3:in `change'
-e:1:in `<main>'
Tasks: TOP => db:migrate
(See full trace by running task with --trace)

Not sure where to get started. Most other questions seem to related to Linux and when i tried to create the symlink also it did not work.

Answer 1

You should install postgresql-9.4-postgis-2.1