getting mongo right on travis

.travis.yml

@@ -12,7 +12,6 @@ services:
   - mongodb
 
 install:
-#  - pecl -s -q install mongo && echo "extension=mongo.so" >> `php --ini | grep "Loaded Configuration" | sed -e "s|.*:\s*||"`
   - composer self-update && composer --version
 #  - composer require satooshi/php-coveralls 0.6.* --dev --prefer-dist
   - echo 'elasticsearch version ' && curl http://localhost:9200/
@@ -20,6 +19,7 @@ install:
   - tests/unit/data/travis/memcache-setup.sh
   - tests/unit/data/travis/cubrid-setup.sh
   - tests/unit/data/travis/sphinx-setup.sh
+  - echo "extension = mongo.so" >> ~/.phpenv/versions/$(phpenv version-name)/etc/php.ini
 
 before_script:
   - mysql -e 'CREATE DATABASE yiitest;';