Edited after Stefan's comments.

DEPENDS.txt

@@ -2,15 +2,13 @@ Build Requirements
 ------------------
 * `Python >= 2.5 <http://python.org>`__
 * `Numpy >= 1.6 <http://numpy.scipy.org/>`__
-* `Cython >= 0.15 <http://www.cython.org/>`__
+* `Cython >= 0.17 <http://www.cython.org/>`__
 
 `Matplotlib >= 1.0 <http://matplotlib.sf.net>`__ is needed to generate the
 examples in the documentation.
 
-If you like to use pip in a virtualenv, you can do the following to build the
-development version of scikit-image:
+You can use pip to automatically install the base dependencies as follows:
 $ pip install -r requirements.txt
-$ python setup.py install
 
 Runtime requirements
 --------------------

requirements.txt

@@ -1,3 +1,3 @@
-cython>=0.15
+cython>=0.17
 matplotlib>=1.0
 numpy>=1.6

setup.py

@@ -21,7 +21,7 @@ VERSION             = '0.9dev'
 PYTHON_VERSION      = (2, 5)
 DEPENDENCIES        = {
                         'numpy': (1, 6),
-                        'Cython': (0, 15),
+                        'Cython': (0, 17),
                       }