Assuming you're using virtualenv and pip and working in your virutalenv ((your-env)username@computer:~$).

1. Download PIL, but do not install it:

   $ pip install --no-install PIL
   

2. For Freetype support: edit setup.py in {your-virtualenv-folder}/build/PIL. On line 40 change FREETYPE­_­ROOT = None to FREETYPE­_­ROOT = libinclude('/usr/X11'):

   # Library pointers.
   #
   # Use None to look for the libraries in well-known library locations.
   Theme: Basic Nature
   
   # Use a string to specify a single directory, for both the library and
   # the include files.  Use a tuple to specify separate directories:
   # (libpath, includepath).  Examples:
   #
   # JPEG_ROOT = "/home/libraries/jpeg-6b"
   # TIFF_ROOT = "/opt/tiff/lib", "/opt/tiff/include"
   #
   # If you have "lib" and "include" directories under a common parent,
   # you can use the "libinclude" helper:
   #
   # TIFF_ROOT = libinclude("/opt/tiff")
   
   TCL_ROOT = None
   JPEG_ROOT = None
   ZLIB_ROOT = None
   TIFF_ROOT = None
   FREETYPE_ROOT = libinclude('/usr/X11')
   LCMS_ROOT = None
   
   # FIXME: add mechanism to explicitly *disable* the use of a library
   # --------------------------------------------------------------------
   

3. Get libjpeg (choose any version, when I installed v9 was the latest):

   $ curl -O http://www.ijg.org/files/jpegsrc.v9.tar.gz
   $ tar zxvf jpegsrc.v9.tar.gz
   $ cd jpeg-9/
   $ ./configure
   $ make
   $ sudo make install
   

4. Install PIL:

   $ pip install PIL
   

Done!