from setuptools import setup, find_packages

setup(
    name = "sebastian",
    version = "0.0.3",
    description = "symbolic music analysis and composition library in Python",
    license = "MIT",
    url = "http://github.com/jtauber/sebastian",
    author = "James Tauber",
    author_email = "jtauber@jtauber.com",
    packages = find_packages(),
)
@@ -344,9 +344,42 @@
 ages(),%0A
-)
+    install_requires = %5B'six'%5D,%0A)%0A

Add six to install_requires