fix(eval): take nix-options into account when doing colmena eval

src/nix/hive/mod.rs

@@ -246,6 +246,7 @@ impl Hive {
     pub async fn nix_flags_with_builders(&self) -> ColmenaResult<NixFlags> {
         let mut flags = NixFlags::default();
         flags.set_show_trace(self.show_trace);
+        flags.set_options(self.nix_options.clone());
 
         if let Some(machines_file) = &self.get_meta_config().await?.machines_file {
             flags.set_builders(Some(format!("@{}", machines_file)));