diff --git a/src/cli.rs b/src/cli.rs
index 9068da6..76b63e3 100644
--- a/src/cli.rs
+++ b/src/cli.rs
@@ -139,7 +139,7 @@ This only works when building locally.
     nix_option: Vec<String>,
     #[arg(
         long,
-        default_value_t,
+        default_value_t = true,
         help = "Use direct flake evaluation (experimental)",
         long_help = r#"If enabled, flakes will be evaluated using `nix eval`. This requires the flake to depend on Colmena as an input and expose a compatible `colmenaHive` output: