diff --git a/configure.py b/configure.py
index dd12c8f432e29..f67ac5067df6b 100644
--- a/configure.py
+++ b/configure.py
@@ -22,6 +22,7 @@
 sys.path.insert(0, os.path.join(base_dir, "third_party", "python", "packaging"))
 sys.path.insert(0, os.path.join(base_dir, "third_party", "python", "pyparsing"))
 sys.path.insert(0, os.path.join(base_dir, "third_party", "python", "six"))
+sys.path.insert(0, os.path.join(base_dir, "third_party", "python", "looseversion"))
 from mach.site import (
     CommandSiteManager,
     ExternalPythonSite,