upd

custom/unlisted-fonts/flake.nix

@@ -20,14 +20,16 @@
 
         packages.monolisa = pkgs.stdenvNoCC.mkDerivation {
           name = "monolisa-font";
-          dontConfigure = true;
-          src = builtins.toPath ./fonts;
+          src = builtins.toPath ./fonts/Monolisa;
+          dontUnpack = true;
+
+          installPhase = ''
+            mkdir -p $out/share/fonts/truetype
+            find $src -type f -name "*.ttf" -exec cp {} $out/share/fonts/truetype/ \;
+          '';
+
+          meta = {description = "Monolisa font.";};
         };
-        installPhase = ''
-          mkdir -p $out/share/fonts/truetype
-          cp -R $src/Moonolisa/*.ttf $out/share/fonts/truetype
-        '';
-        meta = {description = "Monolisa font.";};
       }
     );
 }

flake.lock

@@ -88,18 +88,14 @@
         ]
       },
       "locked": {
-        "lastModified": 1719659382,
-        "narHash": "sha256-fJIgQZ4NI9mLJcT+cBk++gnSzFwxrHtIwb35RXk+bE0=",
-        "owner": "mykhalskyio",
-        "repo": "monolisa-flake",
-        "rev": "6e2a552bb64e54d41d3b19e7072fb675a7efdad8",
-        "type": "github"
+        "path": "./custom/unlisted-fonts/",
+        "type": "path"
       },
       "original": {
-        "owner": "mykhalskyio",
-        "repo": "monolisa-flake",
-        "type": "github"
-      }
+        "path": "./custom/unlisted-fonts/",
+        "type": "path"
+      },
+      "parent": []
     },
     "nixpkgs": {
       "locked": {

system/font.nix

@@ -4,7 +4,9 @@
   system,
   ...
 }: {
-
+  environment.systemPackages = with pkgs; [
+    inputs.monolisa.packages.${system}.monolisa
+  ];
   fonts.packages = with pkgs; [
     nerd-fonts.fira-code
     nerd-fonts.jetbrains-mono