diff --git a/nixos/modules/services/backup/restic.nix b/nixos/modules/services/backup/restic.nix
index ce8bcc3994b8..69df4f60d8de 100644
--- a/nixos/modules/services/backup/restic.nix
+++ b/nixos/modules/services/backup/restic.nix
@@ -465,8 +465,8 @@ in
         # set same environment variables as the systemd service
         ${lib.pipe config.systemd.services."restic-backups-${name}".environment [
           (lib.filterAttrs (n: v: v != null && n != "PATH"))
-          (lib.mapAttrsToList (n: v: "${n}=${v}"))
-          (lib.concatStringsSep "\n")
+          (lib.mapAttrs (_: v: "${v}"))
+          (lib.toShellVars)
         ]}
         PATH=${config.systemd.services."restic-backups-${name}".environment.PATH}:$PATH