dependencies: Annotate the DependencyPackages class

1 files changed, 5 insertions, 1 deletions

diff --git a/mesonbuild/dependencies/detect.py b/mesonbuild/dependencies/detect.py
index f00075b0d..8682e6727 100644
--- a/mesonbuild/dependencies/detect.py
+++ b/mesonbuild/dependencies/detect.py
@@ -20,8 +20,12 @@ if T.TYPE_CHECKING:
     TV_DepIDEntry = T.Union[str, bool, int, None, T.Tuple[str, ...]]
     TV_DepID = T.Tuple[T.Tuple[str, TV_DepIDEntry], ...]
     PackageTypes = T.Union[T.Type[ExternalDependency], DependencyFactory, WrappedFactoryFunc]
+    # Workaround for older python
+    DependencyPackagesType = collections.UserDict[str, PackageTypes]
+else:
+    DependencyPackagesType = collections.UserDict
 
-class DependencyPackages(collections.UserDict):
+class DependencyPackages(DependencyPackagesType):
     data: T.Dict[str, PackageTypes]
     defaults: T.Dict[str, str] = {}