diff --git a/artiq-fast/windows/win.nix b/artiq-fast/windows/win.nix
index 48eb2c3..61faa2e 100644
--- a/artiq-fast/windows/win.nix
+++ b/artiq-fast/windows/win.nix
@@ -250,6 +250,9 @@ let
 
     ${script}
 
+    # Allow install to "settle"
+    sleep 20
+
     win exec 'shutdown /s'
 
     mv c.img $out