diff --git a/packages/bookwyrm/package.nix b/packages/bookwyrm/package.nix
index 0690fb8..4fa573f 100644
--- a/packages/bookwyrm/package.nix
+++ b/packages/bookwyrm/package.nix
@@ -32,6 +32,7 @@ mkDerivation {
 		ln -s ${django}/lib/python3.11/site-packages/* /build/lib/python3.11/site-packages/
 		ln -s ${environs}/lib/python3.11/site-packages/* /build/lib/python3.11/site-packages/
 		ln -s ${libsass}/lib/python3.11/site-packages/* /build/lib/python3.11/site-packages/
+		ln -s ${marshmallow}/lib/python3.11/site-packages/* /build/lib/python3.11/site-packages/
 
 		export PYTHONPATH=/build/lib/python3.11/site-packages