Php – Can’t install Imagick for PHP on Debian from source, error says requires 6.2.4 when I have 6.7.7 installed

Pulling my hair out. PHP built from source, everything working. Now need to install imagick and can't get it installed.

I am running Debian on kernel 3.7.1 with PHP 5.3.20 (the last version my app supports, cannot go to PHP 5.4).

pecl install imagick
...
checking ImageMagick MagickWand API configuration program... found in /usr/bin/Wand-config
checking if ImageMagick version is at least 6.2.4... configure: error: no. You need at least Imagemagick version 6.2.4 to use Imagick.
ERROR: `/tmp/pear/temp/imagick/configure --with-imagick' failed

Yet, I have version 6.7.7 installed:

# convert --version
Version: ImageMagick 6.7.7-10 2012-11-06 Q16 http://www.imagemagick.org
Copyright: Copyright (C) 1999-2012 ImageMagick Studio LLC
Features: OpenMP

I also tried installing the latest beta (pecl install imagick-beta), same result. Also tried an old version 2.3.0, same result. Also tried downloading source, phpize, and configure — same result.