nixos/modules/virtualisation: fix oci-containers with docker

The empty attribute set is invalidly provided as service config and
results in evaluation error.

1 files changed, 4 insertions, 3 deletions

diff --git a/nixos/modules/virtualisation/oci-containers.nix b/nixos/modules/virtualisation/oci-containers.nix
index 36a28efc6ce..61066c3cbd7 100644
--- a/nixos/modules/virtualisation/oci-containers.nix
+++ b/nixos/modules/virtualisation/oci-containers.nix
@@ -304,12 +304,13 @@ let
       # ExecReload = ...;
       ###
 
-      Environment=if cfg.backend == "podman" then "PODMAN_SYSTEMD_UNIT=podman-${name}.service" else {};
-      Type=if cfg.backend == "podman" then "notify" else {};
-      NotifyAccess=if cfg.backend == "podman" then "all" else {};
       TimeoutStartSec = 0;
       TimeoutStopSec = 120;
       Restart = "always";
+    } // optionalAttrs (cfg.backend == "podman") {
+      Environment="PODMAN_SYSTEMD_UNIT=podman-${name}.service";
+      Type="notify";
+      NotifyAccess="all";
     };
   };