diff --git a/flake.nix b/flake.nix
index f4fae2a00..026433c52 100644
--- a/flake.nix
+++ b/flake.nix
@@ -299,6 +299,8 @@
 
           propagatedBuildInputs = propagatedDeps;
 
+          disallowedReferences = [ boost ];
+
           preConfigure =
             ''
               # Copy libboost_context so we don't get all of Boost in our closure.