Move Iosevka Custom to own flake/repo

Packaging Iosevka Custom as separate flake lets me update
independently of main system nixpkgs, so easier to control when to do
the main rebuilds.

flake.lock

@@ -237,7 +237,41 @@
         "type": "github"
       }
     },
+    "iosevka-custom": {
+      "inputs": {
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "lastModified": 1709500140,
+        "narHash": "sha256-UHaP0bLIcdvsm+D5bsJTEgIzct/p2J0Efk8RqGvz52Y=",
+        "ref": "refs/heads/main",
+        "rev": "b1006dd48c47fefca879612360567d5c17038197",
+        "revCount": 4,
+        "type": "git",
+        "url": "https://git.xenia.me.uk/xenia/iosevka.git"
+      },
+      "original": {
+        "type": "git",
+        "url": "https://git.xenia.me.uk/xenia/iosevka.git"
+      }
+    },
     "nixpkgs": {
+      "locked": {
+        "lastModified": 1709237383,
+        "narHash": "sha256-cy6ArO4k5qTx+l5o+0mL9f5fa86tYUX3ozE1S+Txlds=",
+        "owner": "nixos",
+        "repo": "nixpkgs",
+        "rev": "1536926ef5621b09bba54035ae2bb6d806d72ac8",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nixos",
+        "ref": "nixos-unstable",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
       "locked": {
         "lastModified": 1709237383,
         "narHash": "sha256-cy6ArO4k5qTx+l5o+0mL9f5fa86tYUX3ozE1S+Txlds=",
@@ -256,7 +290,8 @@
     "root": {
       "inputs": {
         "home-manager": "home-manager",
-        "nixpkgs": "nixpkgs",
+        "iosevka-custom": "iosevka-custom",
+        "nixpkgs": "nixpkgs_2",
         "stylix": "stylix"
       }
     },

flake.nix

@@ -16,6 +16,7 @@
       url = "github:danth/stylix";
       inputs.nixpkgs.follows = "nixpkgs";
     };
+    iosevka-custom.url = "git+https://git.xenia.me.uk/xenia/iosevka.git";
   };
 
   outputs = {
@@ -23,6 +24,7 @@
     nixpkgs,
     home-manager,
     stylix,
+    iosevka-custom,
     ...
   }: let
     systemConfig = {
@@ -81,6 +83,16 @@
               nixpkgs.config.allowUnfree = true;
               networking = {inherit hostName;};
               programs.${defaultUserShell}.enable = true;
+              stylix.fonts = let
+                font = name: {
+                  name = iosevka-custom.outputs.names."iosevka-custom-${name}";
+                  package = iosevka-custom.outputs.packages.${system}."iosevka-custom-${name}";
+                };
+              in {
+                serif = font "etoile";
+                sansSerif = font "aile";
+                monospace = font "nerdfont";
+              };
               system = {
                 inherit stateVersion;
                 autoUpgrade = {

system/iosevka.nix

@@ -1,116 +0,0 @@
-{
-  stdenv,
-  iosevka,
-  nerd-font-patcher,
-}: let
-  customBuildPlan = {
-    noCvSs = true;
-    exportGlyphNames = false;
-    ligations.inherits = "dlig";
-    weights = {
-      Regular = {
-        shape = 400;
-        menu = 400;
-        css = 400;
-      };
-      Bold = {
-        shape = 700;
-        menu = 700;
-        css = 700;
-      };
-    };
-    variants.design = {
-      capital-g = "toothless-corner-serifless-hooked";
-      capital-j = "serifed-both-sides";
-      capital-q = "crossing";
-      capital-r = "curly-serifless";
-      e = "rounded";
-      f = "tailed";
-      g = "double-storey-open";
-      i = "tailed-serifed";
-      j = "serifed";
-      k = "cursive-serifless";
-      l = "tailed-serifed";
-      q = "diagonal-tailed-serifless";
-      y = "cursive-serifless";
-      z = "straight-serifless-with-horizontal-crossbar";
-      lower-delta = "flat-top";
-      lower-lambda = "tailed-turn";
-      lower-xi = "flat-top";
-      lower-chi = "semi-chancery-straight";
-      zero = "tall-slashed";
-      one = "no-base";
-      two = "straight-neck";
-      three = "flat-top";
-      four = "semi-open";
-      five = "oblique-arched";
-      six = "open-contour";
-      seven = "bend-serifless-crossbar";
-      eight = "two-circles";
-      nine = "open-contour";
-      asterisk = "hex-low";
-      underscore = "high";
-      caret = "high";
-      paren = "normal";
-      brace = "straight";
-      number-sign = "slanted";
-      ampersand = "closed";
-      at = "fourfold";
-      percent = "dots";
-      question = "corner";
-      lig-ltgteq = "flat";
-      lig-neq = "more-slanted";
-      lig-equal-chain = "without-notch";
-      lig-hyphen-chain = "without-notch";
-      lig-double-arrow-bar = "without-notch";
-      lig-single-arrow-bar = "without-notch";
-    };
-  };
-in {
-  etoile = rec {
-    name = "Iosevka Custom Etoile";
-    package = iosevka.override {
-      set = "etoile";
-      privateBuildPlan = {
-        inherit (customBuildPlan) noCvSs exportGlyphNames variants weights;
-        family = name;
-        spacing = "quasi-proportional";
-        serifs = "slab";
-      };
-    };
-  };
-  aile = rec {
-    name = "Iosevka Custom Aile";
-    package = iosevka.override {
-      set = "aile";
-      privateBuildPlan = {
-        inherit (customBuildPlan) noCvSs exportGlyphNames variants weights;
-        family = name;
-        spacing = "quasi-proportional";
-        serifs = "sans";
-      };
-    };
-  };
-  nerdfont = let
-    font = iosevka.override {
-      set = "custom";
-      privateBuildPlan = {
-        inherit (customBuildPlan) noCvSs exportGlyphNames variants weights;
-        family = "Iosevka Custom";
-        spacing = "normal";
-        serifs = "sans";
-      };
-    };
-  in {
-    name = "IosevkaCustomNerdFont";
-    package = stdenv.mkDerivation {
-      name = "${font.name}-nerd-font-patched";
-      src = font;
-      nativeBuildInputs = [nerd-font-patcher];
-      buildPhase = ''
-        find \( -name \*.ttf -o -name \*.otf \) -execdir nerd-font-patcher -c {} \;
-      '';
-      installPhase = "cp -a . $out";
-    };
-  };
-}

system/stylix.nix

@@ -25,20 +25,13 @@
       package = pkgs.catppuccin-cursors.${variant};
       name = "Catppuccin-${catppuccinVariant}-Dark-Cursors";
     };
-    fonts = let
+    fonts = {
-      iosevkaCustom = import ./iosevka.nix {
-        inherit (pkgs) stdenv iosevka nerd-font-patcher;
-      };
-    in {
       sizes = {
         applications = 16;
         desktop = 20;
         popups = 20;
         terminal = 16;
       };
-      serif = {inherit (iosevkaCustom.etoile) name package;};
-      sansSerif = {inherit (iosevkaCustom.aile) name package;};
-      monospace = {inherit (iosevkaCustom.nerdfont) name package;};
       emoji = {
         name = "EmojiOne Color";
         package = pkgs.emojione;