diff --git a/hive.nix b/hive.nix
index 6c1a087..f5a17f3 100644
--- a/hive.nix
+++ b/hive.nix
@@ -6,7 +6,7 @@ let
     .applyPatches' sources';
 
   nix-lib = import ./lib/nix-lib;
-  inherit (nix-lib) warn;
+  inherit (nix-lib) mapSingleFuse;
 
   patch = import ./lib/nix-patches { patchFile = ./patches; };
 
@@ -22,17 +22,12 @@ let
 
   nixpkgs' = import ./meta/nixpkgs.nix;
   # All supported nixpkgs versions × systems, instanciated
-  nixpkgs = nix-lib.mapSingleFuse (
-    s: nix-lib.mapSingleFuse (mkSystemNixpkgs s) nixpkgs'.versions
-  ) nixpkgs'.systems;
+  nixpkgs = mapSingleFuse (s: mapSingleFuse (mkSystemNixpkgs s) nixpkgs'.versions) nixpkgs'.systems;
 
   # Get the configured nixos version for the node,
   # defaulting to the one defined in meta/nixpkgs
   version = node: nodes'.${node}.nixpkgs.version;
-  system =
-    node:
-    nodes'.${node}.nixpkgs.system
-      or (warn "${node}: Not specifying the `deployment.systemType` is deprecated!" "nixos");
+  system = node: nodes'.${node}.nixpkgs.system;
 
   nodePkgs = node: nixpkgs.${system node}.${version node};
 
@@ -88,7 +83,7 @@ in
 
 {
   meta = {
-    nodeNixpkgs = nix-lib.mapSingleFuse nodePkgs nodes;
+    nodeNixpkgs = mapSingleFuse nodePkgs nodes;
 
     specialArgs = {
       inherit nixpkgs sources;
@@ -96,7 +91,7 @@ in
       dgn-keys = import ./keys;
     };
 
-    nodeSpecialArgs = nix-lib.mapSingleFuse mkArgs nodes;
+    nodeSpecialArgs = mapSingleFuse mkArgs nodes;
   };
 
   registry = {
@@ -140,4 +135,4 @@ in
     };
   };
 }
-// (nix-lib.mapSingleFuse mkNode nodes)
+// (mapSingleFuse mkNode nodes)