continuousphp use phpbrew, most extensions are pre-compiled, if you need to install a missing extension, for the selected PHP version(s) of your project pipeline, use a Phing target as below.

By example, to install a specific PECL extension, use the following Phing target:

<?xml version="1.0" encoding="UTF-8" ?>
<project name="contexts">
    <target name="install-uopz-php-ext" description="Install uopz PECL extension">
      <exec command="phpbrew ext install uopz" passthru="true"/>