--- a/rust/hg-cpython/Cargo.toml	Wed Sep 30 18:23:43 2020 +0200
+++ b/rust/hg-cpython/Cargo.toml	Wed Sep 30 18:10:53 2020 +0200
@@ -10,6 +10,7 @@
 
 [features]
 default = ["python27"]
+dirstate-tree = ["hg-core/dirstate-tree"]
 
 # Features to build an extension module:
 python27 = ["cpython/python27-sys", "cpython/extension-module-2-7"]