nix: exorcise all with <expr>; uses

modules/sddm.nix

@@ -1,23 +1,31 @@
 { config, lib, pkgs, ... }:
 let
+  inherit (lib)
+    mkEnableOption
+    mkIf
+  ;
+
   cfg = config.my.displayManager.sddm;
 in
 {
-  options.my.displayManager.sddm.enable = lib.mkEnableOption "SDDM setup";
+  options.my.displayManager.sddm.enable = mkEnableOption "SDDM setup";
 
-  config = lib.mkIf cfg.enable {
+  config = mkIf cfg.enable {
     services.xserver.displayManager.sddm = {
       enable = true;
       theme = "sugar-candy";
     };
 
-    environment.systemPackages = with pkgs; [
-      packages.sddm-sugar-candy
+    environment.systemPackages = builtins.attrValues {
+      inherit (pkgs.packages)
+        sddm-sugar-candy
+      ;
 
-      # dependencies for sugar-candy theme
-      libsForQt5.qt5.qtgraphicaleffects
-      libsForQt5.qt5.qtquickcontrols2
-      libsForQt5.qt5.qtsvg
-    ];
+      inherit (pkgs.libsForQt5.qt5)
+        qtgraphicaleffects
+        qtquickcontrols2
+        qtsvg
+      ;
+    };
   };
 }

modules/wakeonwlan.nix

@@ -1,8 +1,15 @@
 { config, lib, pkgs, ... }:
 
-with lib;
-
 let
+  inherit (lib)
+    concatStringsSep
+    literalExample
+    mapAttrs'
+    mkIf
+    mkOption
+    nameValuePair
+  ;
+
   cfg = config.my.wakeonwlan;
 
   mkWowlanService = name: cfg:
@@ -20,7 +27,7 @@ let
     };
 in
 {
-  options.my.wakeonwlan = {
+  options.my.wakeonwlan = let inherit (lib) types; in {
     interfaces = mkOption {
       default = { };
       description = "Wireless interfaces where you want to enable WoWLAN";