nixos/syncoid: allow @timer syscalls (#536167)

nixos/modules/services/backup/syncoid.nix

@@ -459,7 +459,8 @@ in
                 "~@privileged"
                 "~@resources"
                 "~@setuid"
-                "~@timer"
+                # NB: pv after 1.11.0 uses timer syscalls (specifically setitimer)
+                # "~@timer"
               ];
               SystemCallArchitectures = "native";
               # This is for BindPaths= and BindReadOnlyPaths=

pkgs/by-name/pv/pv/package.nix

@@ -2,6 +2,7 @@
   lib,
   stdenv,
   fetchurl,
+  nixosTests,
 }:
 
 stdenv.mkDerivation (finalAttrs: {
@@ -13,6 +14,9 @@ stdenv.mkDerivation (finalAttrs: {
     hash = "sha256-/ALJ/CuCsgqSzI2Y+ES+Y/IqvZh1Go5KvIdeHYA2Yus=";
   };
 
+  # pv is used by syncoid (part of the sanoid package) by default
+  passthru.tests = nixosTests.sanoid;
+
   meta = {
     homepage = "https://www.ivarch.com/programs/pv.shtml";
     description = "Tool for monitoring the progress of data through a pipeline";