diff --git a/crates/uv-auth/src/middleware.rs b/crates/uv-auth/src/middleware.rs
index 527ea53c9..42858e259 100644
--- a/crates/uv-auth/src/middleware.rs
+++ b/crates/uv-auth/src/middleware.rs
@@ -503,14 +503,13 @@ impl Middleware for AuthMiddleware {
             .then_some(self.pyx_token_store.as_ref())
             .flatten()
         {
-            let domain = store
-                .api()
-                .domain()
-                .unwrap_or("pyx.dev")
-                .trim_start_matches("api.");
+            let login_param = match store.api().domain() {
+                None | Some("api.pyx.dev") => "pyx.dev".to_owned(),
+                Some(_) => format!("{}", Realm::from(store.api())),
+            };
             Err(Error::Middleware(format_err!(
                 "Run `{}` to authenticate uv with pyx",
-                format!("uv auth login {domain}").green()
+                format!("uv auth login {login_param}").green()
             )))
         } else {
             Err(Error::Middleware(format_err!(