diff --git a/nixbld-etc-nixos/backup-module.nix b/nixbld-etc-nixos/backup-module.nix
index 221f96a..4688c8c 100644
--- a/nixbld-etc-nixos/backup-module.nix
+++ b/nixbld-etc-nixos/backup-module.nix
@@ -13,7 +13,7 @@ let
     ${config.services.mysql.package}/bin/mysqldump --single-transaction flarum > flarum.sql
     ${pkgs.sudo}/bin/sudo -u mattermost ${config.services.postgresql.package}/bin/pg_dump mattermost > mattermost.sql
 
-    ${pkgs.gnutar}/bin/tar cf - /etc/nixos /var/lib/gitea flarum.sql mattermost.sql | \
+    ${pkgs.gnutar}/bin/tar cf - --exclude "/var/lib/gitea/repositories/*/*.git/archives" /etc/nixos /var/lib/gitea flarum.sql mattermost.sql | \
         ${pkgs.bzip2}/bin/bzip2 | \
         ${pkgs.gnupg}/bin/gpg --symmetric --batch --passphrase-file /etc/nixos/secret/backup-passphrase | \
         ${pkgs.rclone}/bin/rclone rcat --config /etc/nixos/secret/rclone.conf dropbox:backup-`date +%F`.tar.bz2.gpg