diff --git a/src/cargo/util/toml/mod.rs b/src/cargo/util/toml/mod.rs
index 3dbff95a4..6063e65fd 100644
--- a/src/cargo/util/toml/mod.rs
+++ b/src/cargo/util/toml/mod.rs
@@ -519,18 +519,17 @@ pub fn to_real_manifest(
                  `[workspace]`, only one can be specified"
         ),
     };
-
-    let package_name = &package.name;
-    if package_name.contains(':') {
-        features.require(Feature::open_namespaces())?;
-    }
-
     let inherit_cell: LazyCell<InheritableFields> = LazyCell::new();
     let inherit = || {
         inherit_cell
             .try_borrow_with(|| load_inheritable_fields(gctx, manifest_file, &workspace_config))
     };
 
+    let package_name = &package.name;
+    if package_name.contains(':') {
+        features.require(Feature::open_namespaces())?;
+    }
+
     let version = package
         .version
         .clone()