try installing monaspace but doesnt quite work

custom-pkgs/default.nix

@@ -1,3 +1,4 @@
 pkgs: {
   cargo-bisect-rustc = import ./cargo-bisect-rustc/default.nix pkgs;
+  monaspace = import ./monaspace.nix pkgs;
 }

custom-pkgs/monaspace.nix

@@ -0,0 +1,50 @@
+# Copied from https://github.com/NixOS/nixpkgs/blob/703b9db6c5154530264bd7b6b09552596d0e5ede/pkgs/by-name/mo/monaspace/package.nix,
+# in nixos-unstable soon
+{ lib, stdenv, fetchzip, ... }:
+
+stdenv.mkDerivation (finalAttrs: {
+  pname = "monaspace";
+  version = "1.000";
+
+  src = fetchzip {
+    url = "https://github.com/githubnext/monaspace/releases/download/v${finalAttrs.version}/monaspace-v${finalAttrs.version}.zip";
+    stripRoot = false;
+    hash = "sha256-H8NOS+pVkrY9DofuJhPR2OlzkF4fMdmP2zfDBfrk83A=";
+  };
+
+  outputs = [ "out" "woff" ];
+
+  installPhase = ''
+    runHook preInstall
+    pushd monaspace-v${finalAttrs.version}/fonts/
+    install -Dm644 otf/*.otf -t $out/share/fonts/opentype
+    install -Dm644 variable/*.ttf -t $out/share/fonts/truetype
+    install -Dm644 webfonts/*.woff -t $woff/share/fonts/woff
+    popd
+    runHook postInstall
+  '';
+
+  meta = {
+    description = "An innovative superfamily of fonts for code";
+    longDescription = ''
+      Since the earliest days of the teletype machine, code has been set in
+      monospaced type — letters, on a grid. Monaspace is a new type system that
+      advances the state of the art for the display of code on screen.
+      Every advancement in the technology of computing has been accompanied by
+      advancements to the display and editing of code. CRTs made screen editors
+      possible. The advent of graphical user interfaces gave rise to integrated
+      development environments.
+      Even today, we still have limited options when we want to layer additional
+      meaning on top of code. Syntax highlighting was invented in 1982 to help
+      children to code in BASIC. But beyond colors, most editors must
+      communicate with developers through their interfaces — hovers, underlines,
+      and other graphical decorations.
+      Monaspace offers a more expressive palette for code and the tools we use
+      to work with it.
+    '';
+    homepage = "https://monaspace.githubnext.com/";
+    license = lib.licenses.ofl;
+    maintainers = with lib.maintainers; [ AndersonTorres ];
+    platforms = lib.platforms.all;
+  };
+})

flake.lock

@@ -7,11 +7,11 @@
         ]
       },
       "locked": {
-        "lastModified": 1698479159,
+        "lastModified": 1699025595,
-        "narHash": "sha256-rJHBDwW4LbADEfhkgGHjKGfL2dF44NrlyXdXeZrQahs=",
+        "narHash": "sha256-e+o4PoSu2Z6Ww8y/AVUmMU200rNZoRK+p2opQ7Db8Rg=",
         "owner": "nix-community",
         "repo": "home-manager",
-        "rev": "f92a54fef4eacdbe86b0a2054054dd58b0e2a2a4",
+        "rev": "8765d4e38aa0be53cdeee26f7386173e6c65618d",
         "type": "github"
       },
       "original": {
@@ -43,11 +43,11 @@
     },
     "nixpkgs": {
       "locked": {
-        "lastModified": 1698318101,
+        "lastModified": 1699099776,
-        "narHash": "sha256-gUihHt3yPD7bVqg+k/UVHgngyaJ3DMEBchbymBMvK1E=",
+        "narHash": "sha256-X09iKJ27mGsGambGfkKzqvw5esP1L/Rf8H3u3fCqIiU=",
         "owner": "nixos",
         "repo": "nixpkgs",
-        "rev": "63678e9f3d3afecfeafa0acead6239cdb447574c",
+        "rev": "85f1ba3e51676fa8cc604a3d863d729026a6b8eb",
         "type": "github"
       },
       "original": {
@@ -59,11 +59,11 @@
     },
     "nur": {
       "locked": {
-        "lastModified": 1698493525,
+        "lastModified": 1699174032,
-        "narHash": "sha256-7LGGsrtUrvKZYPMNoEE2A4uHX7gU85RiLPwr/6QY4V4=",
+        "narHash": "sha256-OSiNVBhNeleAfMZ4mMMF1h4l95tGfAhWE4OzYtMU3tI=",
         "owner": "nix-community",
         "repo": "NUR",
-        "rev": "7636d4dbfd7aa1a05239272a856c34e2c28724df",
+        "rev": "9d4f93294abb6017f139d8986d91bd4f9db8c083",
         "type": "github"
       },
       "original": {

home-manager/vscode.nix

@@ -6,6 +6,7 @@
     mutableExtensionsDir = true;
     userSettings = {
       # Note: In settings.json, `.` in a key is not equivalent to a nested object property.
+      # Language-specific
       "[nix]"."editor.formatOnSave" = true;
       "[nix]"."editor.defaultFormatter" = "jnoortheen.nix-ide";
       "nix.enableLanguageServer" = true;
@@ -17,18 +18,21 @@
           };
         };
       };
+      "prolog.executablePath" = lib.getExe pkgs.swiProlog;
       "[typescript]"."editor.defaultFormatter" = "esbenp.prettier-vscode";
       "[javascript]"."editor.defaultFormatter" = "esbenp.prettier-vscode";
       "[json]"."editor.defaultFormatter" = "esbenp.prettier-vscode";
       "[jsonc]"."editor.defaultFormatter" = "esbenp.prettier-vscode";
       "[html]"."editor.defaultFormatter" = "esbenp.prettier-vscode";
       "[css]"."editor.defaultFormatter" = "esbenp.prettier-vscode";
+
+      # Generic
       "window.zoomLevel" = 1;
       "terminal.integrated.enableMultiLinePasteWarning" = false;
       "git.confirmSync" = false;
       "debug.allowBreakpointsEverywhere" = false;
-
+      # "editor.fontFamily" = "'Monaspace Neon Var', Arial";
-      "prolog.executablePath" = lib.getExe pkgs.swiProlog;
+      "editor.fontLigatures" = true;
     };
     extensions = with pkgs.vscode-extensions; [
       bmalehorn.vscode-fish
@@ -77,6 +81,12 @@
         version = "0.8.23";
         sha256 = "sha256-Da2dCpruVqzP3g1hH0+TyvvEa1wEwGXgvcmIq9B/2cQ=";
       }
+      {
+        publisher = "evan-buss";
+        name = "font-switcher";
+        version = "4.1.0";
+        sha256 = "sha256-KkXUfA/W73kRfs1TpguXtZvBXFiSMXXzU9AYZGwpVsY=";
+      }
     ] ++ [
       (pkgs.vscode-utils.buildVscodeExtension {
         name = "riverdelta";

nixos/configuration.nix

@@ -1,7 +1,11 @@
 # This is your system's configuration file.
 # Use this to configure your system environment (it replaces /etc/nixos/configuration.nix)
 
-{ inputs, lib, config, pkgs, ... }: {
+{ inputs, lib, config, pkgs, ... }:
+let
+  customPkgs = import ../custom-pkgs/default.nix pkgs;
+in
+{
   # You can import other NixOS modules here
   imports = [
     # If you want to use modules from other flakes (such as nixos-hardware):
@@ -151,6 +155,8 @@
     #media-session.enable = true;
   };
 
+  fonts.packages = with pkgs; [ fira-code customPkgs.monaspace ];
+
   services.tailscale = {
     enable = true;
     useRoutingFeatures = "both";