diff --git a/.appveyor.yml b/.appveyor.yml
index 719527396..80a1fabe5 100644
--- a/.appveyor.yml
+++ b/.appveyor.yml
@@ -26,7 +26,7 @@ shallow_clone: false
 environment:
   DTS: datalad_next
   APPVEYOR_BUILD_WORKER_IMAGE: Ubuntu2004
-  INSTALL_SYSPKGS: python3-virtualenv graphicsmagick-imagemagick-compat moreutils jq
+  INSTALL_SYSPKGS: python3-virtualenv graphicsmagick-imagemagick-compat moreutils jq uidmap
   INSTALL_GITANNEX: git-annex -m snapshot