It seems there are still some issues (on Windows).
==> default: Initializing pear config...
==> default: PEAR_Config::writeConfigFile fopen('/root/.pearrc','w') failed (fopen(/root/.pearrc): failed to open stream: Permission denied)
==> default: PEAR_Config::writeConfigFile fopen('/root/.pearrc','w') failed (fopen(/root/.pearrc): failed to open stream: Permission denied)
==> default: PEAR_Config::writeConfigFile fopen('/root/.pearrc','w') failed (fopen(/root/.pearrc): failed to open stream: Permission denied)
==> default: Enabling pear auto-discover...
==> default: PEAR_Config::writeConfigFile fopen('/root/.pearrc','w') failed (fopen(/root/.pearrc): failed to open stream: Permission denied)
==> default: Congratulations! Now you have PHP with 5.6.0 as 5.6.0
==> default: To use the newly built PHP, try the line(s) below:
==> default:
==> default: $ phpbrew use 5.6.0
==> default:
==> default: Or you can use switch command to switch your default php to 5.6.0:
==> default:
==> default: $ phpbrew switch 5.6.0
==> default:
==> default: Enjoy!
==> default: [Debug] -------------------------------------------------------
==> default: [Info] Successfully built php
==> default: [Error] Failed to copy "/opt/phpbrew/build/php-5.6.0/build.log" because file does not exist.
==> default: [Info] Finished in 7.59m