diff --git a/README.md b/README.md
index cb370da91..ddb888f2d 100644
--- a/README.md
+++ b/README.md
@@ -15,45 +15,93 @@ The config files are bundled with the build pack itself:
 Pre-compiling binaries
 ----------------------
 
-    # apache
-    mkdir /app
-    wget http://apache.cyberuse.com//httpd/httpd-2.2.19.tar.gz
-    tar xvzf httpd-2.2.19.tar.gz
-    cd httpd-2.2.19
-    ./configure --prefix=/app/apache --enable-rewrite
-    make
-    make install
-    cd ..
-    
-    # php
-    wget http://us2.php.net/get/php-5.3.6.tar.gz/from/us.php.net/mirror 
-    mv mirror php.tar.gz
-    tar xzvf php.tar.gz
-    cd php-5.3.6/
-    ./configure --prefix=/app/php --with-apxs2=/app/apache/bin/apxs --with-mysql --with-pdo-mysql --with-pgsql --with-pdo-pgsql --with-iconv --with-gd --with-curl=/usr/lib --with-config-file-path=/app/php --enable-soap=shared --with-openssl
-    make
-    make install
-    cd ..
-    
-    # php extensions
-    mkdir /app/php/ext
-    cp /usr/lib/libmysqlclient.so.15 /app/php/ext/
-    
-    # pear
-    apt-get install php5-dev php-pear
-    pear config-set php_dir /app/php
-    pecl install apc
-    mkdir /app/php/include/php/ext/apc
-    cp /usr/lib/php5/20060613/apc.so /app/php/ext/
-    cp /usr/include/php5/ext/apc/apc_serializer.h /app/php/include/php/ext/apc/
-    
-    
-    # package
-    cd /app
-    echo '2.2.19' > apache/VERSION
-    tar -zcvf apache.tar.gz apache
-    echo '5.3.6' > php/VERSION
-    tar -zcvf php.tar.gz php
+In a Heroku Dyno, one can run the following as executable text.  After
+running it, `/app` will contain, among other entities,
+`apache-2.2.25.tar.gz` and `php-5.3.27.tar.gz`, which should be
+uploaded to a location that can be downloaded by the build pack (see
+the URIs in `compile`).
+
+    #!/bin/bash
+    set -uex
+    cd /tmp
+
+    # Clear /app directory
+    find /app -mindepth 1 -print0 | xargs -0 rm -rf
+
+    # Take care of vendoring Apache.
+    httpd_version=2.2.25
+    httpd_dirname=httpd-$httpd_version
+    httpd_archive_name=$httpd_dirname.tar.bz2
+
+    # Download Apache if necessary.
+    if [ ! -f $httpd_archive_name ]
+    then
+        curl -LO ftp://ftp.osuosl.org/pub/apache//httpd/$httpd_archive_name
+    fi
+
+    # Clean and extract Apache.
+    rm -rf $httpd_dirname
+    tar jxf $httpd_archive_name
+
+    # Build and install Apache.
+    pushd $httpd_dirname
+    ./configure --prefix=/app/apache --enable-rewrite --with-included-apr
+    make -s
+    make install -s
+    popd
+
+    # Take care of vendoring PHP.
+    php_version=5.3.27
+    php_dirname=php-$php_version
+    php_archive_name=$php_dirname.tar.bz2
+
+    # Download PHP if necessary.
+    if [ ! -f $php_archive_name ]
+    then
+        curl -Lo $php_archive_name http://us1.php.net/get/php-5.3.27.tar.bz2/from/www.php.net/mirror
+    fi
+
+    # Clean and extract PHP.
+    rm -rf $php_dirname
+    tar jxf $php_archive_name
+
+    # Compile PHP
+    pushd $php_dirname
+    ./configure --prefix=/app/php --with-apxs2=/app/apache/bin/apxs     \
+    --with-mysql --with-pdo-mysql --with-pgsql --with-pdo-pgsql         \
+    --with-iconv --with-gd --with-curl=/usr/lib                         \
+    --with-config-file-path=/app/php --enable-soap=shared               \
+    --with-openssl
+    make -s
+    make install -s
+    popd
+
+    # Copy in MySQL client library.
+    mkdir -p /app/php/lib/php
+    cp /usr/lib/libmysqlclient.so.16 /app/php/lib/php
+
+    # 'apc' installation
+    #
+    # $PATH manipulation Necessary for 'pecl install', which relies on
+    # PHP binaries relative to $PATH.
+
+    export PATH=/app/php/bin:$PATH
+    /app/php/bin/pecl channel-update pecl.php.net
+
+    # Use defaults for apc build prompts.
+    yes '' | /app/php/bin/pecl install apc
+
+    # Sanitize default cgi-bin to rid oneself of Apache sample
+    # programs.
+    find /app/apache/cgi-bin/ -mindepth 1 -print0 | xargs -0 rm -r
+
+    # Stamp and archive binaries.
+    pushd /app
+    echo $httpd_version > apache/VERSION
+    tar -zcf apache-$httpd_version.tar.gz apache
+    echo $php_version > php/VERSION
+    tar -zcf php-$php_version.tar.gz php
+    popd
 
 
 Hacking
@@ -66,4 +114,4 @@ Meta
 ----
 
 Created by Pedro Belo.
-Many thanks to Keith Rarick for the help with assorted Unix topics :)
\ No newline at end of file
+Many thanks to Keith Rarick for the help with assorted Unix topics :)