diff --git a/src/deploy.rs b/src/deploy.rs
index f9655be..cc2775e 100644
--- a/src/deploy.rs
+++ b/src/deploy.rs
@@ -120,7 +120,7 @@ pub async fn deploy(systems: &[String], show_trace: bool, mode: &str) -> Result<
         if !prev_system.is_empty() {
             con.command("nvd")
                 .arg("--color")
-                .arg("--always")
+                .arg("always")
                 .arg("diff")
                 .arg(String::from_utf8(prev_system)?)
                 .arg(toplevel)