diff --git a/lib.nix b/lib.nix
index 97a0e48..d3a7f5f 100644
--- a/lib.nix
+++ b/lib.nix
@@ -22,9 +22,9 @@ let
   getIfAttr = as: a: if hasAttr as a then getAttr as a else null;
 
   getHostIpv4 = hostname:
-    getIfAttr (getHostNetworkSettings hostname) "ipv4-address";
+    getIfAttr "ipv4-address" (getHostNetworkSettings hostname);
   getHostIpv6 = hostname:
-    getIfAttr (getHostNetworkSettings hostname) "ipv6-address";
+    getIfAttr "ipv6-address" (getHostNetworkSettings hostname);
   getHostIps = hostname:
     filter (o: o != null) [ (getHostIpv4 hostname) (getHostIpv6 hostname) ];