diff --git a/nix/build-all.py b/nix/build-all.py
index f6646eff5a..934eb5daae 100644
--- a/nix/build-all.py
+++ b/nix/build-all.py
@@ -488,7 +488,7 @@ dependency_tree: dict[str, tuple[str, ...]] = {
     "occ": (),
     "pcre": (),
     "json": (),
-    "cgal": (),
+    "cgal": ("boost",),
     "eigen": (),
     "rocksdb": ("zstd",),
     "zstd": (),