diff --git a/configs/moodle-dl/meinhark.nix b/configs/moodle-dl/meinhark.nix
index f51a051..c6bc4b1 100644
--- a/configs/moodle-dl/meinhark.nix
+++ b/configs/moodle-dl/meinhark.nix
@@ -65,9 +65,9 @@ in
 
   services.nfs.server = {
     enable = true;
-    exports = ''
-      /export        10.243.2.4(fsid=0)      10.243.2.85(fsid=0)
-      /export/moodle 10.243.2.4(insecure,rw) 10.243.2.85(insecure,rw)
+    exports = let machines = with (import <niveum/lib>).retiolumAddresses; [kabsa manakish]; in ''
+      /export        ${lib.concatMapStringsSep " " (machine: "${machine.ipv4}(fsid=0)") machines}
+      /export/moodle ${lib.concatMapStringsSep " " (machine: "${machine.ipv4}(insecure,rw)") machines}
     '';
   };
 }
diff --git a/lib/default.nix b/lib/default.nix
index 98060cd..7f327bf 100644
--- a/lib/default.nix
+++ b/lib/default.nix
@@ -34,6 +34,8 @@ rec {
 
   defaultApplications = import ./default-applications.nix;
 
+  retiolumAddresses = import ./retiolum-network.nix;
+
   localAddresses = import ./local-network.nix;
 
   email-sshKey = "ssh-ed25519 AAAAC3NzaC1lZDI1NTE5AAAAINKz33wHtPuIfgXEb0+hybxFGV9ZuPsDTLUZo/+hlcdA";
diff --git a/lib/retiolum-network.nix b/lib/retiolum-network.nix
new file mode 100644
index 0000000..e1eb846
--- /dev/null
+++ b/lib/retiolum-network.nix
@@ -0,0 +1,21 @@
+{
+  kabsa = {
+    ipv4 = "10.243.2.4";
+    ipv6 = "42:0:3c46:861f:a118:8e9a:82c9:3d";
+  };
+
+  zaatar = {
+    ipv4 = "10.243.2.34";
+    ipv6 = "42:0:3c46:156e:10b6:3bd6:6e82:b2cd";
+  };
+
+  makanek = {
+    ipv4 = "10.243.2.84";
+    ipv6 = "42:0:3c46:f7a9:1f0a:1b2b:822a:6050";
+  };
+
+  manakish = {
+    ipv4 = "10.243.2.85";
+    ipv6 = "42:0:3c46:ac99:ae36:cb8:c551:ba27";
+  };
+}
diff --git a/systems/kabsa/configuration.nix b/systems/kabsa/configuration.nix
index 44dfdf0..42dc0cf 100644
--- a/systems/kabsa/configuration.nix
+++ b/systems/kabsa/configuration.nix
@@ -1,6 +1,7 @@
 { config, pkgs, lib, ... }:
 let
   nixpkgs-unstable = import <nixpkgs-unstable> { config.allowUnfree = true; };
+  inherit (import <niveum/lib>) retiolumAddresses;
 in
 {
   imports = [
@@ -39,10 +40,7 @@ in
 
   networking.wireless.interfaces = [ "wlp3s0" ];
 
-  networking.retiolum = {
-    ipv4 = "10.243.2.4";
-    ipv6 = "42:0:3c46:861f:a118:8e9a:82c9:3d";
-  };
+  networking.retiolum = retiolumAddresses.kabsa;
 
   system.stateVersion = "19.03";
 }
diff --git a/systems/makanek/configuration.nix b/systems/makanek/configuration.nix
index 6e2ca45..2d68fe0 100644
--- a/systems/makanek/configuration.nix
+++ b/systems/makanek/configuration.nix
@@ -1,6 +1,6 @@
 { lib, config, pkgs, ... }:
 let
-  inherit (import <niveum/lib>) kieran;
+  inherit (import <niveum/lib>) kieran retiolumAddresses;
 in
 {
   imports = [
@@ -87,10 +87,7 @@ in
 
   services.openssh.enable = true;
 
-  networking.retiolum = {
-    ipv4 = "10.243.2.84";
-    ipv6 = "42:0:3c46:f7a9:1f0a:1b2b:822a:6050";
-  };
+  networking.retiolum = retiolumAddresses.makanek;
 
   environment.etc."tinc/retiolum/rsa_key.priv" = {
     text = builtins.readFile <system-secrets/retiolum.key>;
diff --git a/systems/manakish/configuration.nix b/systems/manakish/configuration.nix
index e5f312f..a519e91 100644
--- a/systems/manakish/configuration.nix
+++ b/systems/manakish/configuration.nix
@@ -3,6 +3,9 @@
 # and in the NixOS manual (accessible by running ‘nixos-help’).
 
 { config, pkgs, ... }:
+let
+  inherit (import <niveum/lib>) retiolumAddresses;
+in
 {
   imports = [ # Include the results of the hardware scan.
     ./hardware-configuration.nix
@@ -45,10 +48,7 @@
     git vim
   ];
 
-  networking.retiolum = {
-    ipv4 = "10.243.2.85";
-    ipv6 = "42:0:3c46:ac99:ae36:cb8:c551:ba27";
-  };
+  networking.retiolum = retiolumAddresses.manakish;
 
   networking.hostName = "manakish";
 
diff --git a/systems/zaatar/configuration.nix b/systems/zaatar/configuration.nix
index 70df560..36ae0df 100644
--- a/systems/zaatar/configuration.nix
+++ b/systems/zaatar/configuration.nix
@@ -1,4 +1,7 @@
 { config, pkgs, lib, ... }:
+let
+  inherit (import <niveum/lib>) retiolumAddresses;
+in
 {
   imports = [
     ./hardware-configuration.nix
@@ -117,10 +120,7 @@
   networking.hostName = "zaatar";
   networking.wireless.interfaces = [ "wlp2s0" ];
 
-  networking.retiolum = {
-    ipv4 = "10.243.2.34";
-    ipv6 = "42:0:3c46:156e:10b6:3bd6:6e82:b2cd";
-  };
+  networking.retiolum = retiolumAddresses.zaatar;
 
   system.stateVersion = "20.09";
 }