diff --git a/nixos/modules/services/backup/zrepl.nix b/nixos/modules/services/backup/zrepl.nix
index 73f5e4d9f6d7..1b4216ed1714 100644
--- a/nixos/modules/services/backup/zrepl.nix
+++ b/nixos/modules/services/backup/zrepl.nix
@@ -13,6 +13,13 @@ in
     services.zrepl = {
       enable = mkEnableOption "zrepl";
 
+      package = mkOption {
+        type = types.package;
+        default = pkgs.zrepl;
+        defaultText = literalExpression "pkgs.zrepl";
+        description = "Which package to use for zrepl";
+      };
+
       settings = mkOption {
         default = { };
         description = ''
@@ -30,14 +37,14 @@ in
   ### Implementation ###
 
   config = mkIf cfg.enable {
-    environment.systemPackages = [ pkgs.zrepl ];
+    environment.systemPackages = [ cfg.package ];
 
     # zrepl looks for its config in this location by default. This
     # allows the use of e.g. `zrepl signal wakeup <job>` without having
     # to specify the storepath of the config.
     environment.etc."zrepl/zrepl.yml".source = configFile;
 
-    systemd.packages = [ pkgs.zrepl ];
+    systemd.packages = [ cfg.package ];
 
     # Note that pkgs.zrepl copies and adapts the upstream systemd unit, and
     # the fields defined here only override certain fields from that unit.