diff --git a/build_installers.py b/build_installers.py
index ec76a4a8..3457524f 100644
--- a/build_installers.py
+++ b/build_installers.py
@@ -451,7 +451,8 @@ def lockfiles():
         from conda.base.context import context
 
         if WINDOWS:
-            local_channel = f"file:///{context.croot.replace('\\', '/')}"
+            local_channel = context.croot.replace('\\', '/')
+            local_channel = f"file:///{local_channel}"
         else:
             local_channel = f"file://{context.croot}"
         if not local_channel.endswith("/"):