Move link to bottom of docs page.
diff --git a/docs/installation.rst b/docs/installation.rst
index cdee29c..967e86c 100644
--- a/docs/installation.rst
+++ b/docs/installation.rst
@@ -167,8 +167,6 @@
cd ..
CFLAGS="-I${CWD}/openssl/include" LDFLAGS="-L${CWD}/openssl/lib" pip wheel cryptography
-.. _virtualenv: https://virtualenv.pypa.io/en/latest/
-
Building cryptography on OS X
-----------------------------
@@ -255,3 +253,4 @@
.. _`64-bit`: https://jenkins.cryptography.io/job/openssl-win64-release/
.. _`bug in conda`: https://github.com/conda/conda-recipes/issues/110
.. _`Greg Wilson's blog post`: http://software-carpentry.org/blog/2014/04/mr-biczo-was-right.html
+.. _virtualenv: https://virtualenv.pypa.io/en/latest/