feat: tocharian font

configs/default.nix

@@ -21,6 +21,7 @@ in {
           allowUnfree = true;
           packageOverrides = pkgs: {
             gfs-fonts = pkgs.callPackage <niveum/packages/gfs-fonts.nix> {};
+            tocharian-font = pkgs.callPackage <niveum/packages/tocharian-font.nix> {};
             iolanguage = pkgs.callPackage <niveum/packages/iolanguage.nix> { };
             ix = pkgs.callPackage <niveum/packages/ix.nix> { };
           };

configs/fonts.nix

@@ -30,6 +30,7 @@
       jetbrains-mono
       twemoji-color-font
       joypixels
+      tocharian-font
     ];
     fontconfig.defaultFonts = {
       monospace = [ "JetBrains Mono" "JoyPixels" ];

packages/tocharian-font.nix

@@ -0,0 +1,24 @@
+{ stdenv, lib, fetchurl, mupdf }:
+stdenv.mkDerivation {
+  pname = "tocharian-font";
+  version = "unstable-2022-01-11";
+  src = fetchurl {
+    url = "https://unicode.org/L2/L2015/15236-tocharian.pdf";
+    sha256 = "08bzkva9a6b2cfl38p9m22b1cf6yv27xsw6nrvq5ly5nffjm32hv";
+  };
+  dontUnpack = true;
+  buildInputs = [ mupdf ];
+  buildPhase = ''
+    mutool extract $src
+  '';
+  installPhase = ''
+    mkdir -p $out/share/fonts/truetype
+    install font-0021.ttf $out/share/fonts/truetype/Tocharian.ttf
+  '';
+  meta = with lib; {
+    description = "Tocharian font by Lee Wilson";
+    license = licenses.unfree;
+    platforms = platforms.all;
+    maintainers = with maintainers; [ kmein ];
+  };
+}