diff --git a/crates/fj-host/src/lib.rs b/crates/fj-host/src/lib.rs
index c0d227fd1..57c133714 100644
--- a/crates/fj-host/src/lib.rs
+++ b/crates/fj-host/src/lib.rs
@@ -91,7 +91,8 @@ impl Model {
 
         let command = command_root
             .arg("rustc")
-            .args(["--manifest-path", &manifest_path]);
+            .args(["--manifest-path", &manifest_path])
+            .args(["--crate-type", "cdylib"]);
 
         let cargo_output = command.output()?;
         let exit_status = cargo_output.status;