Fix for patch2178 - will self-accept as the change is
clearly Windows-only and it does fix the build.
1 patch for repository darcs-unstable@darcs.net:screened:
patch dc801d1b085b78da9d934934c94482445562c121
Author: Ganesh Sittampalam <ganesh@earth.li>
Date: Thu Jun 3 18:05:22 BST 2021
* Windows build fix in Darcs.UI.External