 ~/code/web/pwr (master*) [1.8.6/pwr] % gem install do_postgres
Building native extensions.  This could take a while...
ERROR:  Error installing do_postgres:
	ERROR: Failed to build gem native extension.

/Users/teamon/.rvm/ruby-1.8.6-p383/bin/ruby extconf.rb
extconf.rb:3: command not found: pg_config --includedir-server
extconf.rb:10: command not found: pg_config --libdir
extconf.rb:10: command not found: pg_config --includedir
extconf.rb:10: command not found: pg_config --libdir
checking for main() in -lpq... no
checking for main() in -llibpq... no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
	--with-opt-dir
	--without-opt-dir
	--with-opt-include
	--without-opt-include=${opt-dir}/include
	--with-opt-lib
	--without-opt-lib=${opt-dir}/lib
	--with-make-prog
	--without-make-prog
	--srcdir=.
	--curdir
	--ruby=/Users/teamon/.rvm/ruby-1.8.6-p383/bin/ruby
	--with-pgsql-server-dir
	--without-pgsql-server-dir
	--with-pgsql-server-include
	--without-pgsql-server-include=${pgsql-server-dir}/include
	--with-pgsql-server-lib
	--without-pgsql-server-lib=${pgsql-server-dir}/lib
	--with-pgsql-client-dir
	--without-pgsql-client-dir
	--with-pgsql-client-include
	--without-pgsql-client-include=${pgsql-client-dir}/include
	--with-pgsql-client-lib
	--without-pgsql-client-lib=${pgsql-client-dir}/lib
	--with-pqlib
	--without-pqlib
	--with-libpqlib
	--without-libpqlib
Could not find PostgreSQL build environment (libraries & headers): Makefile not created


Gem files will remain installed in /Users/teamon/.rvm/gems/ruby/1.8.6%pwr/gems/do_postgres-0.10.0 for inspection.
Results logged to /Users/teamon/.rvm/gems/ruby/1.8.6%pwr/gems/do_postgres-0.10.0/ext/do_postgres_ext/gem_make.out
zsh: exit 1     gem install do_postgres
 ~/code/web/pwr (master*) [1.8.6/pwr] %