diff --git a/mastus/configuration.nix b/mastus/configuration.nix
index f2b032d..6856067 100644
--- a/mastus/configuration.nix
+++ b/mastus/configuration.nix
@@ -6,6 +6,7 @@
       /etc/nixos/hardware-configuration.nix
       ../basic-tools.nix
       ./backup.nix
+      ./duplicity.nix
 
       ./mail.nix
       ./www.nix
diff --git a/mastus/duplicity.nix b/mastus/duplicity.nix
new file mode 100644
index 0000000..36fce78
--- /dev/null
+++ b/mastus/duplicity.nix
@@ -0,0 +1,7 @@
+{ config, pkgs, ... }:
+
+{
+
+  environment.systemPackages = [ pkgs.duplicity ];
+
+}