diff --git a/nixos/modules/system/boot/systemd-unit-options.nix b/nixos/modules/system/boot/systemd-unit-options.nix
index 5255f1a1b97a..2cff25a8c854 100644
--- a/nixos/modules/system/boot/systemd-unit-options.nix
+++ b/nixos/modules/system/boot/systemd-unit-options.nix
@@ -217,7 +217,7 @@ in rec {
 
     environment = mkOption {
       default = {};
-      type = with types; attrsOf (nullOr (either str package));
+      type = with types; attrsOf (nullOr (either str (either path package)));
       example = { PATH = "/foo/bar/bin"; LANG = "nl_NL.UTF-8"; };
       description = "Environment variables passed to the service's processes.";
     };