diff --git a/nixos/modules/services/networking/skydns.nix b/nixos/modules/services/networking/skydns.nix
index 3b939091489..f5eb452fec6 100644
--- a/nixos/modules/services/networking/skydns.nix
+++ b/nixos/modules/services/networking/skydns.nix
@@ -79,7 +79,7 @@ in {
         ETCD_CACERT = cfg.etcd.caCert;
         SKYDNS_ADDR = cfg.address;
         SKYDNS_DOMAIN = cfg.domain;
-        SKYDNS_NAMESERVER = concatStringsSep "," cfg.nameservers;
+        SKYDNS_NAMESERVERS = concatStringsSep "," cfg.nameservers;
       };
       serviceConfig = {
         ExecStart = "${cfg.package}/bin/skydns";