diff --git a/src/bentoml/_internal/bento/build_config.py b/src/bentoml/_internal/bento/build_config.py
index 9e4c2c8abb..5b5bf75dc5 100644
--- a/src/bentoml/_internal/bento/build_config.py
+++ b/src/bentoml/_internal/bento/build_config.py
@@ -284,6 +284,12 @@ def conda_dependencies_validator(
                 )
 
 
+if TYPE_CHECKING:
+    ListStr: t.TypeAlias = list[str]
+else:
+    ListStr = list
+
+
 @attr.frozen
 class CondaOptions:
 
@@ -295,14 +301,14 @@ class CondaOptions:
     environment_yml: t.Optional[str] = None
     channels: t.Optional[t.List[str]] = attr.field(
         default=None,
-        validator=attr.validators.optional(attr.validators.instance_of(list)),
+        validator=attr.validators.optional(attr.validators.instance_of(ListStr)),
     )
     dependencies: t.Optional[DependencyType] = attr.field(
         default=None, validator=attr.validators.optional(conda_dependencies_validator)
     )
     pip: t.Optional[t.List[str]] = attr.field(
         default=None,
-        validator=attr.validators.optional(attr.validators.instance_of(list)),
+        validator=attr.validators.optional(attr.validators.instance_of(ListStr)),
     )
 
     def __attrs_post_init__(self):
@@ -402,7 +408,7 @@ class PythonOptions:
     )
     packages: t.Optional[t.List[str]] = attr.field(
         default=None,
-        validator=attr.validators.optional(attr.validators.instance_of(list)),
+        validator=attr.validators.optional(attr.validators.instance_of(ListStr)),
     )
     lock_packages: t.Optional[bool] = attr.field(
         default=None,
@@ -418,15 +424,15 @@ class PythonOptions:
     )
     trusted_host: t.Optional[t.List[str]] = attr.field(
         default=None,
-        validator=attr.validators.optional(attr.validators.instance_of(list)),
+        validator=attr.validators.optional(attr.validators.instance_of(ListStr)),
     )
     find_links: t.Optional[t.List[str]] = attr.field(
         default=None,
-        validator=attr.validators.optional(attr.validators.instance_of(list)),
+        validator=attr.validators.optional(attr.validators.instance_of(ListStr)),
     )
     extra_index_url: t.Optional[t.List[str]] = attr.field(
         default=None,
-        validator=attr.validators.optional(attr.validators.instance_of(list)),
+        validator=attr.validators.optional(attr.validators.instance_of(ListStr)),
     )
     pip_args: t.Optional[str] = attr.field(
         default=None,
@@ -434,7 +440,7 @@ class PythonOptions:
     )
     wheels: t.Optional[t.List[str]] = attr.field(
         default=None,
-        validator=attr.validators.optional(attr.validators.instance_of(list)),
+        validator=attr.validators.optional(attr.validators.instance_of(ListStr)),
     )
 
     def __attrs_post_init__(self):