diff --git a/nixos/common.nix b/nixos/common.nix
index 5468df94d..b5bcfa571 100644
--- a/nixos/common.nix
+++ b/nixos/common.nix
@@ -85,7 +85,7 @@ in
     backupCommand = mkOption {
       type = types.nullOr (types.either types.str types.path);
       default = null;
-      example = lib.literalExpression "''${pkgs.trash-cli}/bin/trash";
+      example = lib.literalExpression "\${pkgs.trash-cli}/bin/trash";
       description = ''
         On activation run this command on each existing file
         rather than exiting with an error.