diff --git a/config/net/serv.nix b/config/net/serv.nix
index 5f59b6f..25101a7 100644
--- a/config/net/serv.nix
+++ b/config/net/serv.nix
@@ -66,6 +66,7 @@
       sdrweb = "172.20.73.60";
       bind = "172.20.73.61";
       blogs = "172.20.73.62";
+      nix-build = "172.20.73.63";
     };
     subnets6.dn42 = "fd23:42:c3d2:582::/64";
     subnets6.up4 = "2a00:8180:2c00:282::/64";
@@ -95,6 +96,7 @@
       stats = "fd23:42:c3d2:582:2:0:0:3";
       zeit = "fd23:42:c3d2:582:2:0:0:5";
       direkthilfe = "fd23:42:c3d2:582:1cde:c5ff:fe47:8c2a";
+      nix-build = "fd23:42:c3d2:582:683d:a9ff:fe45:3d1f";
     };
     hosts6.up4 = {
       bind = "2a00:8180:2c00:282:cd7:56ff:fe69:6366";
@@ -126,6 +128,7 @@
       ticker = "2a00:8180:2c00:282:b407:40ff:fec1:81f2";
       zeit = "2a00:8180:2c00:282:2:0:0:5";
       direkthilfe = "2a00:8180:2c00:282:1cde:c5ff:fe47:8c2a";
+      nix-build = "2a00:8180:2c00:282:683d:a9ff:fe45:3d1f";
     };
   };