chore(deps): bump actions/checkout from 4 to 6

Bumps [actions/checkout](https://github.com/actions/checkout) from 4 to 6.
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](https://github.com/actions/checkout/compare/v4...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yml

@@ -41,7 +41,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout repository
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
     - name: Install nix
       uses: cachix/install-nix-action@v31
       with:

flake.nix

@@ -19,7 +19,5 @@
           lib.filterAttrs
             (_: v: lib.isDerivation v)
             self.legacyPackages.${system});
-
-      overlays.default = import ./overlay.nix;
     };
 }

overlay.nix

@@ -7,6 +7,7 @@ let
   isReserved = n: n == "lib" || n == "overlays" || n == "modules";
   nameValuePair = n: v: { name = n; value = v; };
   nurAttrs = import ./default.nix { pkgs = super; };
+
 in
 builtins.listToAttrs
   (map (n: nameValuePair n nurAttrs.${n})

pkgs/fcitx5-toki-pona/default.nix

@@ -1,41 +0,0 @@
-{ stdenv
-, fetchFromGitHub
-, kdePackages
-, python3
-, libime
-, lib
-}:
-
-stdenv.mkDerivation {
-  pname = "fcitx5-toki-pona";
-  version = "git";
-  src = fetchFromGitHub {
-    owner = "msyds";
-    repo = "fcitx5-toki-pona";
-    rev = "4b4314d642c647bc714c8876460b6779facda89c";
-    # rev = "icons";
-    hash = "sha256-5Keg+7AYkELYAlJkPszcjHgJ6TwBxnwNd3cpxSOEbGc=";
-  };
-  # src = /home/msyds/git/fcitx5-toki-pona;
-  buildInputs = [
-    kdePackages.fcitx5-chinese-addons
-  ];
-  nativeBuildInputs = [
-    python3
-    libime
-  ];
-
-  buildPhase = ''
-    runHook preBuild
-    python3 combine.py
-    runHook postBuild
-  '';
-
-  installPhase = ''
-    runHook preInstall
-    install -Dm644 -t $out/share/fcitx5/table table/*
-    install -Dm644 -t $out/share/fcitx5/inputmethod confs/*
-    find icons -name '*.png' -exec install -Dm644 {} "$out/share/{}" \;
-    runHook postInstall
-  '';
-}

pkgs/gf-core/default.nix

@@ -1,30 +0,0 @@
-{ haskell
-, stdenv
-, fetchFromGitHub
-, gf-pgf
-, applyPatches
-, compiler ? "ghc98"
-}:
-
-let
-  version = "3.12";
-  src = applyPatches rec {
-    src = fetchFromGitHub {
-      owner = "GrammaticalFramework";
-      repo = "gf-core";
-      rev = "release-${version}";
-      hash = "sha256-9sB8tt2eOJT43kv2eaUYRQCzyBZOp6HvJdgGJQgiqks=";
-    };
-    patches = [
-      "${src}/nix/expose-all.patch"
-      "${src}/nix/revert-new-cabal-madness.patch"
-      ./fix-cabal-syntax-error.patch
-    ];
-  };
-  hpkgs = haskell.packages.${compiler};
-  pkg = hpkgs.callCabal2nixWithOptions "gf" src "--flag=-server" {};
-in haskell.lib.overrideCabal pkg (prev: {
-  jailbreak = true;
-  configureFlags = [ "-f" "c-runtime" ];
-  librarySystemDepends = [ gf-pgf ];
-})

pkgs/gf-core/fix-cabal-syntax-error.patch

@@ -1,13 +0,0 @@
-diff --git a/src/runtime/haskell-bind/pgf2.cabal b/src/runtime/haskell-bind/pgf2.cabal
-index d7a98489e..3ca7e816c 100644
---- a/src/runtime/haskell-bind/pgf2.cabal
-+++ b/src/runtime/haskell-bind/pgf2.cabal
-@@ -15,7 +15,7 @@ homepage: https://www.grammaticalframework.org/
- bug-reports: https://github.com/GrammaticalFramework/gf-core/issues
- author: Krasimir Angelov
- extra-source-files: CHANGELOG.md, README.md
--tested-with: GHC==7.10.3, GHC==8.0.2, GHC==8.10.4, GHC=9.6.6
-+tested-with: GHC==7.10.3, GHC==8.0.2, GHC==8.10.4, GHC==9.6.6
- 
- library
-   exposed-modules:

pkgs/gf-pgf/default.nix

@@ -1,11 +0,0 @@
-{ gf-core
-, stdenv
-, autoreconfHook
-}:
-
-stdenv.mkDerivation {
-  pname = "gf-pgf";
-  inherit (gf-core) version meta;
-  src = "${gf-core.src}/src/runtime/c";
-  nativeBuildInputs = [autoreconfHook ];
-}

pkgs/gf-rgl/default.nix

@@ -1,25 +0,0 @@
-{ stdenv
-, ghc
-, gf-core
-, fetchFromGitHub
-}:
-
-stdenv.mkDerivation (finalAttrs: {
-  name = "gf-rgl";
-  version = "20250812";
-  src = fetchFromGitHub {
-    owner = "GrammaticalFramework";
-    repo = "gf-rgl";
-    tag = finalAttrs.version;
-    hash = "sha256-rqN5MV/XxChXC+Vs4aLIhRtyPQZNk0LQZ2TCdbd6wUw=";
-  };
-  buildInputs = [ ghc gf-core ];
-  LC_ALL = "C.UTF-8";
-  buildPhase = ''
-    runghc Setup.hs build
-  '';
-  installPhase = ''
-    mkdir -p $out/share/gf/lib
-    runghc Setup.hs copy --dest=$out/share/gf/lib
-  '';
-})

pkgs/gf/default.nix

@@ -1,4 +0,0 @@
-# Alias for `gf-core`
-{ gf-core }:
-
-gf-core

pkgs/gfWithPackages/default.nix

@@ -1,22 +0,0 @@
-{ lib
-, stdenv
-, gf-core
-, makeWrapper
-, runCommandLocal
-}:
-
-packages:
-
-let
-  opts = {
-    passthru = {
-      preferLocalBuild = true;
-      inherit (gf-core) version meta;
-    };
-  };
-  paths = lib.makeSearchPath "share/gf/lib" packages;
-in runCommandLocal "gf-with-rgl" opts ''
-  . ${makeWrapper}/nix-support/setup-hook
-  makeWrapper ${gf-core}/bin/gf $out/bin/gf \
-    --prefix GF_LIB_PATH : ${paths}
-''

pkgs/gftest/default.nix

@@ -1,26 +0,0 @@
-{ gf-core
-, breakpointHook
-, fetchFromGitHub
-, compiler ? "ghc98"
-, haskell
-, pgf2-haskell
-, gf-pgf
-}:
-
-let
-  src = fetchFromGitHub {
-    owner = "GrammaticalFramework";
-    repo = "gftest";
-    rev = "ef7c99143d84a29fb28bbc464f661566d44a6130";
-    hash = "sha256-t/LaG5+bdv7f0URcn/aFx6nUIvxSSEbpWeZS92/Gbog=";
-  };
-  hpkgs = haskell.packages.${compiler}.extend (final: prev: {
-    # PGF2, the Haskell bindings to the C library.
-    pgf2 = pgf2-haskell.override { inherit compiler; };
-  });
-  pkg = hpkgs.callCabal2nix "gftest" src {};
-in pkg.overrideAttrs (final: prev: {
-  nativeBuildInputs = (prev.nativeBuildInputs or []) ++ [
-    breakpointHook
-  ];
-})

pkgs/iropke-batang/default.nix

@@ -1,30 +0,0 @@
-{ stdenvNoCC
-, fetchFromGitHub
-, lib
-}:
-
-stdenvNoCC.mkDerivation (finalAttrs: {
-  pname = "iropke-batang";
-  version = "1.2";
-  src = fetchFromGitHub {
-    owner = "iropke";
-    repo = "font-iropke-batang";
-    rev = "v${finalAttrs.version}";
-    hash = "sha256-wsu7JK0hHYn9aegaMeNV9fWvQ6KoMzHwOFWymWHYvxo=";
-  };
-
-  installPhase = ''
-    runHook preInstall
-    find . -type f -name '*.otf' \
-      -exec install -Dm644 {} -t $out/share/fonts/opentype \;
-    runHook postInstall
-  '';
-
-  meta = {
-    description = "Korean serif font";
-    homepage = "http://font.iropke.com/batang/";
-    changelog = "https://github.com/iropke/font-iropke-batang/releases";
-    license = lib.licenses.ofl;
-    platforms = lib.platforms.all;
-  };
-})

pkgs/pgf2-haskell/default.nix

@@ -1,19 +0,0 @@
-{ haskell
-, compiler ? "ghc96"
-, gf-pgf
-, gf-core
-, breakpointHook
-}:
-
-let
-  src = "${gf-core.src}/src/runtime/haskell-bind";
-  hpkgs = haskell.packages.${compiler};
-  pkg = hpkgs.callCabal2nix "pgf2" src {
-    # gf-pgf provides both libpgf and libgu.
-    gu = gf-pgf;
-  };
-in haskell.lib.overrideCabal pkg (prev: {
-  librarySystemDepends = (prev.librarySystemDepends or []) ++ [
-    gf-pgf
-  ];
-})

pkgs/quiver/default.nix

@@ -1,12 +1,4 @@
-{ stdenv
+{ stdenv, fetchNpmDeps, fetchFromGitHub, fetchzip, fetchurl, lib, imagemagick, nodejs_20 }:
-, fetchNpmDeps
-, fetchFromGitHub
-, fetchzip
-, fetchurl
-, lib
-, imagemagick
-, nodejs_20
-}:
 
 let
   vendoredKatex = fetchzip {
@@ -21,7 +13,7 @@ let
     url = "https://storage.googleapis.com/workbox-cdn/releases/7.0.0/workbox-window.prod.mjs.map";
     hash = "sha256-tUBiVoiKi3OCT+wctUYl0FVnT7StsGBDx7EzculcF5I=";
   };
-  rev = "1816fb788e4d315bf1dc30053a5e1646eb0af9b8";
+  rev = "9872f3f9265f92643387239e76042c8d3ffeb410";
 in stdenv.mkDerivation (final: {
   pname = "quiver";
   version = lib.substring 0 7 rev;
@@ -30,11 +22,11 @@ in stdenv.mkDerivation (final: {
     owner = "varkor";
     repo = "quiver";
     inherit rev;
-    hash = "sha256-29x2x0fLemkxhv+85wPnDrrlRW2h5qJtF/QTbGa6ghE=";
+    hash = "sha256-wSyCzUSLUL5nzUe5E4RdWv44WGd4C9WO6udkKY9cyBs=";
   };
   npmDeps = fetchNpmDeps {
     src = "${final.src}/service-worker";
-    hash = "sha256-1CdgZFvpyJFyh5x9ljTau6vrR7FeHRYZ1MG/ZOEoou8=";
+    hash = "sha256-xlww7Yfle58Qdwn/IcA6E6Fy7ZvH/ltKdlk6hvcC4UM=";
   };
   preBuild = ''
     cp -r $vendoredKatex src/KaTeX

pkgs/syd-plex-latex/default.nix

@@ -1,32 +0,0 @@
-{ stdenvNoCC
-, texlive
-}:
-
-stdenvNoCC.mkDerivation (final: {
-  pname = "syd-plex-latex";
-  version = "1.0.0";
-  src = ./.;
-  nativeBuildInputs = [ texlive.combined.scheme-small ];
-  passthru = {
-    pkgs = [ final.finalPackage ];
-    tlDeps = with texlive; [
-      plex
-      plex-otf
-      fontaxes
-      unicode-math
-      xetex
-      fontspec
-      xltxtra
-      realscripts
-      xecjk
-    ];
-    tlType = "run";
-  };
-  installPhase = ''
-    runHook preInstall
-    dir="$out/tex/latex/syd-plex"
-    mkdir -p "$dir"
-    mv syd-plex.sty "$dir"
-    runHook postInstall
-  '';
-})

pkgs/syd-plex-latex/syd-plex.sty

@@ -1,15 +0,0 @@
-\NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{syd-plex}[2025/12/01 Configure IBM Plex fonts]
-
-% Redefine some commands to make unicode-math work lol.  See §3.1 of the
-% unicode-math manual.
-\renewcommand*{\mathrm}[1]{\symup{#1}}
-
-\RequirePackage{plex-otf}
-\RequirePackage{xeCJK}
-\setmathfont{IBM Plex Math}
-\setmainfont{IBM Plex Serif}
-\setCJKmainfont{IBM Plex Sans KR}
-
-% Use sans-serif for \operatorname
-\setoperatorfont\mathsf