fix maybe?

stylix.nix

@@ -49,45 +49,8 @@
         name = config.stylix.fonts.monospace.name;
       };
       monospace = {
-        package = (
+        package = null;
-          pkgs.iosevka.override {
+        name = "Iosevka Custom";
-            set = "Custom";
-            privateBuildPlan = ''
-                              [buildPlans.IosevkaCustom]
-              family = "Iosevka Custom"
-              spacing = "fontconfig-mono"
-              serifs = "slab"
-              noCvSs = true
-              exportGlyphNames = false
-
-                [buildPlans.IosevkaCustom.variants]
-                inherits = "ss12"
-
-              [buildPlans.IosevkaCustom.weights.Regular]
-              shape = 400
-              menu = 400
-              css = 400
-
-              [buildPlans.IosevkaCustom.weights.Bold]
-              shape = 700
-              menu = 700
-              css = 700
-
-              [buildPlans.IosevkaCustom.slopes.Upright]
-              angle = 0
-              shape = "upright"
-              menu = "upright"
-              css = "normal"
-
-              [buildPlans.IosevkaCustom.slopes.Italic]
-              angle = 9.4
-              shape = "italic"
-              menu = "italic"
-              css = "italic"
-            '';
-          }
-        );
-        name = "Iosevka";
       };
 
       emoji = {