diff --git a/pkgs/by-name/ka/kazumi/package.nix b/pkgs/by-name/ka/kazumi/package.nix
index dea6fd9658b6..7f179dd28e39 100644
--- a/pkgs/by-name/ka/kazumi/package.nix
+++ b/pkgs/by-name/ka/kazumi/package.nix
@@ -11,23 +11,27 @@
   mimalloc,
   mpv,
   mpv-unwrapped,
+  runCommand,
+  yq,
+  kazumi,
+  _experimental-update-script-combinators,
+  gitUpdater,
 }:
+
 flutter327.buildFlutterApplication rec {
   pname = "kazumi";
-  version = "1.5.4";
+  version = "1.5.6";
 
   src = fetchFromGitHub {
     owner = "Predidit";
     repo = "Kazumi";
     tag = version;
-    hash = "sha256-OVMJnSaIL0mm+Uf8tnGkbszYcQxf4vl9B+RwQVvzHbA=";
+    hash = "sha256-UBylNN6UViYuUn70eV0VSsnfN6/kGAFIaa9GU/OV9Zo=";
   };
 
   pubspecLock = lib.importJSON ./pubspec.lock.json;
 
-  nativeBuildInputs = [
-    autoPatchelfHook
-  ];
+  nativeBuildInputs = [ autoPatchelfHook ];
 
   buildInputs = [
     webkitgtk_4_1
@@ -89,25 +93,44 @@ flutter327.buildFlutterApplication rec {
       };
   };
 
-  gitHashes = {
-    desktop_webview_window = "sha256-Z9ehzDKe1W3wGa2AcZoP73hlSwydggO6DaXd9mop+cM=";
-    webview_windows = "sha256-9oWTvEoFeF7djEVA3PSM72rOmOMUhV8ZYuV6+RreNzE=";
-    media_kit = "sha256-ciznKvZedg2poq377zkyjwyeGRxq0N7b/Rh4upCoths=";
-    media_kit_libs_android_video = "sha256-ciznKvZedg2poq377zkyjwyeGRxq0N7b/Rh4upCoths=";
-    media_kit_libs_ios_video = "sha256-ciznKvZedg2poq377zkyjwyeGRxq0N7b/Rh4upCoths=";
-    media_kit_libs_linux = "sha256-ciznKvZedg2poq377zkyjwyeGRxq0N7b/Rh4upCoths=";
-    media_kit_libs_macos_video = "sha256-ciznKvZedg2poq377zkyjwyeGRxq0N7b/Rh4upCoths=";
-    media_kit_libs_video = "sha256-ciznKvZedg2poq377zkyjwyeGRxq0N7b/Rh4upCoths=";
-    media_kit_libs_windows_video = "sha256-ciznKvZedg2poq377zkyjwyeGRxq0N7b/Rh4upCoths=";
-    media_kit_video = "sha256-ciznKvZedg2poq377zkyjwyeGRxq0N7b/Rh4upCoths=";
-  };
+  gitHashes =
+    let
+      media_kit-hash = "sha256-6V4ZTRsExm8TidznnvAZRXGbkxTLDs7YFNutNh7tLK8=";
+    in
+    {
+      desktop_webview_window = "sha256-Z9ehzDKe1W3wGa2AcZoP73hlSwydggO6DaXd9mop+cM=";
+      webview_windows = "sha256-9oWTvEoFeF7djEVA3PSM72rOmOMUhV8ZYuV6+RreNzE=";
+      media_kit = media_kit-hash;
+      media_kit_libs_android_video = media_kit-hash;
+      media_kit_libs_ios_video = media_kit-hash;
+      media_kit_libs_linux = media_kit-hash;
+      media_kit_libs_macos_video = media_kit-hash;
+      media_kit_libs_video = media_kit-hash;
+      media_kit_libs_windows_video = media_kit-hash;
+      media_kit_video = media_kit-hash;
+    };
 
   postInstall = ''
-    install -Dm0644 ./assets/linux/io.github.Predidit.Kazumi.desktop $out/share/applications/io.github.Predidit.Kazumi.desktop
-    install -Dm0644 ./assets/images/logo/logo_linux.png $out/share/icons/hicolor/512x512/apps/io.github.Predidit.Kazumi.png
+    ln -snf ${mpv}/lib/libmpv.so.2 $out/app/kazumi/lib/libmpv.so.2
+    install -Dm0644 assets/linux/io.github.Predidit.Kazumi.desktop $out/share/applications/io.github.Predidit.Kazumi.desktop
+    install -Dm0644 assets/images/logo/logo_linux.png $out/share/icons/hicolor/512x512/apps/io.github.Predidit.Kazumi.png
   '';
 
-  passthru.updateScript = ./update.sh;
+  passthru = {
+    pubspecSource =
+      runCommand "pubspec.lock.json"
+        {
+          nativeBuildInputs = [ yq ];
+          inherit (kazumi) src;
+        }
+        ''
+          cat $src/pubspec.lock | yq > $out
+        '';
+    updateScript = _experimental-update-script-combinators.sequence [
+      (gitUpdater { })
+      (_experimental-update-script-combinators.copyAttrOutputToFile "kazumi.pubspecSource" ./pubspec.lock.json)
+    ];
+  };
 
   meta = {
     description = "Watch Animes online with danmaku support";
diff --git a/pkgs/by-name/ka/kazumi/pubspec.lock.json b/pkgs/by-name/ka/kazumi/pubspec.lock.json
index 92f08ffb0c3c..4b80849aa863 100644
--- a/pkgs/by-name/ka/kazumi/pubspec.lock.json
+++ b/pkgs/by-name/ka/kazumi/pubspec.lock.json
@@ -36,6 +36,16 @@
       "source": "hosted",
       "version": "2.0.3"
     },
+    "antlr4": {
+      "dependency": "direct main",
+      "description": {
+        "name": "antlr4",
+        "sha256": "752b4a6e4ad97953652a2b2bbf5377f46c94b579d3372b50080c7e5858234a05",
+        "url": "https://pub.dev"
+      },
+      "source": "hosted",
+      "version": "4.13.2"
+    },
     "archive": {
       "dependency": "transitive",
       "description": {
@@ -1565,16 +1575,6 @@
       "source": "hosted",
       "version": "1.3.0"
     },
-    "styled_text": {
-      "dependency": "direct main",
-      "description": {
-        "name": "styled_text",
-        "sha256": "fd624172cf629751b4f171dd0ecf9acf02a06df3f8a81bb56c0caa4f1df706c3",
-        "url": "https://pub.dev"
-      },
-      "source": "hosted",
-      "version": "8.1.0"
-    },
     "synchronized": {
       "dependency": "transitive",
       "description": {
@@ -1956,16 +1956,6 @@
       "source": "hosted",
       "version": "6.5.0"
     },
-    "xmlstream": {
-      "dependency": "transitive",
-      "description": {
-        "name": "xmlstream",
-        "sha256": "cfc14e3f256997897df9481ae630d94c2d85ada5187ebeb868bb1aabc2c977b4",
-        "url": "https://pub.dev"
-      },
-      "source": "hosted",
-      "version": "1.1.1"
-    },
     "xpath_selector": {
       "dependency": "direct main",
       "description": {
@@ -1999,6 +1989,6 @@
   },
   "sdks": {
     "dart": ">=3.5.0 <4.0.0",
-    "flutter": ">=3.27.3"
+    "flutter": ">=3.27.4"
   }
 }
diff --git a/pkgs/by-name/ka/kazumi/update.sh b/pkgs/by-name/ka/kazumi/update.sh
deleted file mode 100755
index a63eea668a66..000000000000
--- a/pkgs/by-name/ka/kazumi/update.sh
+++ /dev/null
@@ -1,19 +0,0 @@
-#!/usr/bin/env nix-shell
-#!nix-shell -I nixpkgs=./. -i bash -p curl jq yq nixVersions.latest bash coreutils nix-update
-
-set -eou pipefail
-
-ROOT="$(dirname "$(readlink -f "$0")")"
-
-latestVersion=$(curl ${GITHUB_TOKEN:+-u ":$GITHUB_TOKEN"} -sL https://api.github.com/repos/Predidit/Kazumi/releases/latest | jq --raw-output .tag_name)
-
-currentVersion=$(nix-instantiate --eval -E "with import ./. {}; kazumi.version or (lib.getVersion kazumi)" | tr -d '"')
-
-if [[ "$currentVersion" == "$latestVersion" ]]; then
-    echo "package is up-to-date: $currentVersion"
-    exit 0
-fi
-
-nix-update kazumi
-
-curl https://raw.githubusercontent.com/Predidit/Kazumi/${latestVersion}/pubspec.lock | yq . >$ROOT/pubspec.lock.json