treewide: import custom lib as lib', simplify mkSystem

I decided to import my custom lib as lib' as it makes it easier to read
and differentiate from lib. I also removed unnecessary imports from my
mkSystem function (that I actually put directly inside
hosts/default.nix, as that made more sense), since system is not needed
anymore (already set in hardware-configuration.nix), and the only
required argument is inputs, that will be then parsed automatically by
nixosSystem.

flake.nix

@@ -24,10 +24,7 @@
       };
     });
     formatter = eachSystem (pkgs: treefmtEval.${pkgs.system}.config.build.wrapper);
-    nixosConfigurations = let
-      lib' = import ./lib {inherit inputs lib';};
-    in
-      import ./hosts {inherit inputs lib';};
+    nixosConfigurations = import ./hosts {inherit inputs;};
     packages = eachSystem (pkgs: import ./pkgs {inherit inputs pkgs;});
     deploy.nodes = import ./nodes {inherit inputs;};
     checks = builtins.mapAttrs (_: deployLib: deployLib.deployChecks self.deploy) deploy-rs.lib;

hosts/default.nix

@@ -1,12 +1,12 @@
-{
-  inputs,
-  lib',
-  ...
-}: let
-  inherit (lib') mkSystem;
+{inputs, ...}: let
+  lib' = import ../lib;
+  mkSystem = args:
+    inputs.nixpkgs.lib.nixosSystem {
+      specialArgs = {inherit inputs lib';};
+      modules = args.modules or [];
+    };
 in {
   vamos = mkSystem {
-    system = "x86_64-linux";
     modules = [
       ./vamos
       ../modules
@@ -15,7 +15,6 @@ in {
   };
 
   solaire = mkSystem {
-    system = "x86_64-linux";
     modules = [
       ./solaire
       ../modules
@@ -23,7 +22,6 @@ in {
   };
 
   anastacia = mkSystem {
-    system = "x86_64-linux";
     modules = [
       ./anastacia
     ];

lib/default.nix

@@ -1,9 +1,4 @@
-{
-  inputs,
-  lib',
-  ...
-}: let
-  inherit (inputs.nixpkgs) lib;
+{lib, ...}: let
   # convert rrggbb hex to rgba(r, g, b, a)
   rgba = c: let
     r = toString (hexToDec (builtins.substring 0 2 c));
@@ -89,23 +84,6 @@
   # Create a KDE konsole color scheme from base16 colors
   mkKonsoleColorScheme = pkgs: scheme:
     pkgs.writeText "${scheme.name}.colorscheme" (schemeToKonsole scheme);
-
-  # https://github.com/diniamo/niqs/blob/caf396bb470619fa06936a379eec6e283c3c3d95/lib/default.nix#L13-L35C7
-  mkSystem = {system, ...} @ args:
-    lib.nixosSystem {
-      system = null;
-      specialArgs = {inherit inputs;};
-      modules =
-        [
-          {
-            _module.args = {
-              inherit system lib';
-            };
-            nixpkgs = {inherit system;};
-          }
-        ]
-        ++ args.modules or [];
-    };
 in {
-  inherit mkKonsoleColorScheme rgba mkSystem;
+  inherit mkKonsoleColorScheme rgba;
 }