nix: Avoid IFD by importing base16 scheme directly

This fixes an issue where previously the derivation had to be evaluated
before importing the base16 scheme, thus causing `nix flake check` to
fail when multi-platform support was added.

See: https://github.com/NixOS/nix/issues/4265

assets/selenized-black.yaml

@@ -0,0 +1,21 @@
+system: "base16"
+name: "selenized-black"
+author: "Jan Warchol (https://github.com/jan-warchol/selenized) / adapted to base16 by ali"
+variant: "dark"
+palette:
+  base00: "181818"
+  base01: "252525"
+  base02: "3b3b3b"
+  base03: "777777"
+  base04: "777777"
+  base05: "b9b9b9"
+  base06: "dedede"
+  base07: "dedede"
+  base08: "ed4a46"
+  base09: "e67f43"
+  base0A: "dbb32d"
+  base0B: "70b433"
+  base0C: "3fc5b7"
+  base0D: "368aeb"
+  base0E: "a580e2"
+  base0F: "eb6eb7"

hosts/laptop/configuration.nix

@@ -24,7 +24,6 @@ in
 
     desktop = {
       bloat = true;
-      theme = "selenized-black";
     };
   };
 }

modules/desktop.nix

@@ -2,9 +2,9 @@
 
 let
   inherit (lib) mkEnableOption mkIf mkMerge mkOption;
-  inherit (lib.types) str float int;
+  inherit (lib.types) float int;
   inherit (config.modules.system) username;
-  inherit (cfg) bloat gnome plasma container theme opacity fontSize graphical phone phosh;
+  inherit (cfg) bloat gnome plasma container opacity fontSize graphical phone phosh;
   inherit (nix-config.packages.${pkgs.system}) aleo-fonts;
   inherit (pkgs) phinger-cursors noto-fonts-cjk-sans maple-mono noto-fonts-emoji;
   inherit (builtins) attrValues;
@@ -22,11 +22,6 @@ in
   };
 
   options.modules.desktop = {
-    theme = mkOption {
-      type = str;
-      default = "monokai";
-    };
-
     opacity = mkOption {
       type = float;
       default = 0.95;
@@ -203,7 +198,7 @@ in
     stylix = {
       image = ../assets/wallpaper.png;
       polarity = "dark";
-      base16Scheme = "${pkgs.base16-schemes}/share/themes/${theme}.yaml";
+      base16Scheme = ../assets/selenized-black.yaml;
 
       opacity = {
         terminal = opacity;