diff --git a/lib/spack/docs/conf.py b/lib/spack/docs/conf.py
index de84d0e5c8f..06a2523ca2c 100644
--- a/lib/spack/docs/conf.py
+++ b/lib/spack/docs/conf.py
@@ -50,7 +50,7 @@
 # documentation root, use os.path.abspath to make it absolute, like shown here.
 sys.path.insert(0, os.path.abspath('exts'))
 sys.path.insert(0, os.path.abspath('../external'))
-sys.path.append(os.path.abspath('../spack'))
+sys.path.append(os.path.abspath('..'))
 
 # Add the Spack bin directory to the path so that we can use its output in docs.
 spack_root = '../../..'