diff --git a/conda/migen/meta.yaml b/conda/migen/meta.yaml
index 263395036..7dd8f380a 100644
--- a/conda/migen/meta.yaml
+++ b/conda/migen/meta.yaml
@@ -8,6 +8,7 @@ source:
 
 build:
   noarch_python: true
+  number: {{ environ.get("GIT_DESCRIBE_NUMBER", 0) }}
   string: py_{{ environ.get("GIT_DESCRIBE_NUMBER", 0) }}
   script: $PYTHON setup.py install