upd

custom/unlisted-fonts/flake.lock

@@ -22,13 +22,13 @@
       "locked": {
         "lastModified": 1747744144,
         "narHash": "sha256-W7lqHp0qZiENCDwUZ5EX/lNhxjMdNapFnbErcbnP11Q=",
-        "owner": "nixos",
+        "owner": "NixOS",
         "repo": "nixpkgs",
         "rev": "2795c506fe8fb7b03c36ccb51f75b6df0ab2553f",
         "type": "github"
       },
       "original": {
-        "owner": "nixos",
+        "owner": "NixOS",
         "ref": "nixos-unstable",
         "repo": "nixpkgs",
         "type": "github"

custom/unlisted-fonts/flake.nix

@@ -1,27 +1,40 @@
-{ stdenvNoCC, lib }:
+{
+  description = "A flake that gives access to the Monolisa font.";
 
-stdenvNoCC.mkDerivation {
+  inputs = {
-  pname = "monolisa-font";
+    nixpkgs.url = "github:NixOS/nixpkgs/nixos-unstable";
-  version = "1.0.0";
+    flake-utils.url = "github:numtide/flake-utils";
-
-  src = ./Monolisa;
-
-  dontUnpack = true;
-  buildPhase = "true";
-
-  installPhase = ''
-    runHook preInstall
-
-    install -dm755 $out/share/fonts/truetype
-    cp -v $src/*.ttf $out/share/fonts/truetype/
-
-    runHook postInstall
-  '';
-
-  meta = with lib; {
-    description = "Monolisa font";
-    homepage = "https://www.monolisa.dev/";
-    license = licenses.unfreeRedistributable;  # because Monolisa is not FOSS
-    platforms = platforms.all;
   };
+
+  outputs = {
+    self,
+    nixpkgs,
+    flake-utils,
+  }:
+    flake-utils.lib.eachDefaultSystem (system: let
+      pkgs = nixpkgs.legacyPackages.${system};
+    in {
+      packages.monolisa-font = pkgs.stdenvNoCC.mkDerivation {
+        pname = "monolisa-font";
+        version = "0.1";
+
+        # Use a relative path to the actual font folder
+        src = ./fonts/Monolisa;
+
+        dontUnpack = true;
+        buildPhase = "true"; # no-op
+
+        installPhase = ''
+          mkdir -p $out/share/fonts/truetype
+          install -m444 -Dt $out/share/fonts/truetype $src/*.ttf
+        '';
+
+        meta = {
+          description = "Monolisa font package";
+          # license = pkgs.lib.licenses.unfree; # change if needed
+        };
+      };
+
+      defaultPackage = self.packages.${system}.monolisa-font;
+    });
 }

custom/unlisted-fonts/result

@@ -1 +1 @@
-/nix/store/d5772qva7s7c253axhjjd4qssp08gfsz-monolisa-font-0.1
+/nix/store/k6957fa1cpy0cdy0jjxfcs5bv7pr8fwk-monolisa-font-0.1

system/font.nix

@@ -5,7 +5,7 @@
   ...
 }: {
   environment.systemPackages = with pkgs; [
-    inputs.monolisa.packages.${system}.monolisa
+    inputs.monolisa.packages.${system}.monolisa-font
   ];
   fonts.packages = with pkgs; [
     nerd-fonts.fira-code