docs: automatically track manual dependencies

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/docs/conf.py b/docs/conf.py
index d6e173ef77..0dbd90dc11 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -67,7 +67,7 @@ needs_sphinx = '1.6'
 # Add any Sphinx extension module names here, as strings. They can be
 # extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
 # ones.
-extensions = ['kerneldoc', 'qmp_lexer', 'hxtool']
+extensions = ['kerneldoc', 'qmp_lexer', 'hxtool', 'depfile']
 
 # Add any paths that contain templates here, relative to this directory.
 templates_path = ['_templates']