diff --git a/auto_firmware_version.py b/auto_firmware_version.py
index 33d2e587c..d2969b762 100644
--- a/auto_firmware_version.py
+++ b/auto_firmware_version.py
@@ -11,7 +11,7 @@
 missing_pkgs = required_pkgs - installed_pkgs
 
 if missing_pkgs:
-    env.Execute('"$PYTHONEXE" -m pip install dulwich --global-option="--pure"')
+    env.Execute('"$PYTHONEXE" -m pip install dulwich"')
 
 from dulwich import porcelain