Not using the php_build script from Joshua anymore, just using Debian packages, in particular:
ii libapache2-mod-php5 5.1.4-0.1 server-side, HTML-embedded scripting languag ii php5-common 5.1.4-0.1 Common files for packages built from the php ii php5-curl 5.1.4-0.1 CURL module for php5 ii php5-dev 5.1.4-0.1 Files for PHP5 module development ii php5-gd 5.1.4-0.1 GD module for php5 ii php5-mcrypt 5.1.2-1 MCrypt module for php5 ii php5-memcache 2.0.1-1 memcache extension module for PHP5 ii php5-mysql 5.1.4-0.1 MySQL module for php5 ii php5-pspell 5.1.2-1 pspell module for php5 ii php5-xmlrpc 5.1.4-0.1 XML-RPC module for php5 ii php5-xsl 5.1.4-0.1 XSL module for php5
Specifically needed php5-dev to compile php_ext. Need to make sure that all the ming functions are built-in.