1 files changed, 3 insertions, 0 deletions
diff --git a/flake.nix b/flake.nix
index 76243d0601..7351571e61 100644
--- a/flake.nix
+++ b/flake.nix
@@ -97,6 +97,9 @@
 
                   # Native dependencies for running Complement.
                   olm
+
+                  # For building the Synapse documentation website.
+                  mdbook
                 ];
 
                 # Install Python and manage a virtualenv with Poetry.