pyenvでvirtualenvしててPILがインストール出来ない件 ref: http://qiita.com/noblejasper/items/ee29e06ccb82ce97af5a

file0.txt

$ pip install PIL

file1.txt

Downloading/unpacking PIL
  Could not find any downloads that satisfy the requirement PIL
  Some insecure and unverifiable files were ignored (use --allow-unverified PIL to allow).
Cleaning up...
No distributions at all found for PIL
Storing debug log for failure in /Users/jasper/.pip/pip.log

file2.txt

pip install PIL --allow-external PIL --allow-unverified PIL

file3.txt

pip install PIL --allow-external PIL --allow-unverified PIL

file4.txt

building '_imagingft' extension

gcc -fno-strict-aliasing -g -O2 -DNDEBUG -g -fwrapv -O3 -Wall -Wstrict-prototypes -I/System/Library/Frameworks/Tcl.framework/Headers -I/System/Library/Frameworks/Tk.framework/Headers -I/usr/local/include/freetype2 -IlibImaging -I/usr/local/opt/pyenv/versions/inblue/include -I/usr/local/include -I/usr/include -I/usr/local/opt/pyenv/versions/2.6.8/include/python2.6 -c _imagingft.c -o build/temp.macosx-10.4-x86_64-2.6/_imagingft.o

_imagingft.c:73:10: fatal error: 'freetype/fterrors.h' file not found

#include <freetype/fterrors.h>

         ^

1 error generated.

error: command 'gcc' failed with exit status 1

----------------------------------------
Cleaning up...
Command /usr/local/opt/pyenv/versions/inblue/bin/python -c "import setuptools, tokenize;__file__='/usr/local/var/lib/pyenv/versions/inblue/build/PIL/setup.py';exec(compile(getattr(tokenize, 'open', open)(__file__).read().replace('
', '
'), __file__, 'exec'))" install --record /var/folders/10/1gcb6yqd4m14g9qr7s0lztg40000gn/T/pip-0bcmkN-record/install-record.txt --single-version-externally-managed --compile --install-headers /usr/local/opt/pyenv/versions/inblue/include/site/python2.6 failed with error code 1 in /usr/local/var/lib/pyenv/versions/inblue/build/PIL
Storing debug log for failure in /Users/jasper/.pip/pip.log

file5.txt

ln -s /usr/local/include/freetype2 /usr/local/include/freetype