diff --git a/pkgs/by-name/ka/kazumi/package.nix b/pkgs/by-name/ka/kazumi/package.nix
index f42f1f48afd8..c1aa591850d9 100644
--- a/pkgs/by-name/ka/kazumi/package.nix
+++ b/pkgs/by-name/ka/kazumi/package.nix
@@ -2,7 +2,6 @@
   lib,
   fetchFromGitHub,
   flutter,
-  stdenv,
   webkitgtk_4_1,
   alsa-lib,
   libayatana-appindicator,
@@ -11,24 +10,18 @@
   wrapGAppsHook3,
   gst_all_1,
   at-spi2-atk,
-  fetchurl,
 }:
 let
-  version = "1.4.1";
+  version = "1.4.2";
   src = fetchFromGitHub {
     owner = "Predidit";
     repo = "Kazumi";
     rev = version;
-    hash = "sha256-LRlJo2zuE3Y3i4vBcjxIYQEDVJ2x85Fn77K4LVtTlg8=";
-  };
-  mdk-sdk = fetchurl {
-    url = "https://github.com/wang-bin/mdk-sdk/releases/download/v0.29.1/mdk-sdk-linux-x64.tar.xz";
-    hash = "sha256-7dkvm5kP3gcQwXOE9DrjoOTzKRiwk/PVeRr7poLdCU0=";
+    hash = "sha256-irX+BmvJ/WI92RQmaSoBQuUqAEiy3bEstZmKMKHTvPY=";
   };
 in
 flutter.buildFlutterApplication {
   pname = "kazumi";
-
   inherit version src;
 
   pubspecLock = lib.importJSON ./pubspec.lock.json;
@@ -52,41 +45,6 @@ flutter.buildFlutterApplication {
     gst_all_1.gst-plugins-base
   ];
 
-  customSourceBuilders = {
-    flutter_volume_controller =
-      { version, src, ... }:
-      stdenv.mkDerivation rec {
-        pname = "flutter_volume_controller";
-        inherit version src;
-        inherit (src) passthru;
-        postPatch = ''
-          substituteInPlace linux/CMakeLists.txt \
-            --replace-fail '# Include ALSA' 'find_package(PkgConfig REQUIRED)' \
-            --replace-fail 'find_package(ALSA REQUIRED)' 'pkg_check_modules(ALSA REQUIRED alsa)'
-        '';
-        installPhase = ''
-          runHook preInstall
-          mkdir $out
-          cp -r ./* $out/
-          runHook postInstall
-        '';
-      };
-    fvp =
-      { version, src, ... }:
-      stdenv.mkDerivation rec {
-        pname = "fvp";
-        inherit version src;
-        inherit (src) passthru;
-        installPhase = ''
-          runHook preInstall
-          tar -xf ${mdk-sdk} -C ./linux
-          mkdir $out
-          cp -r ./* $out/
-          runHook postInstall
-        '';
-      };
-  };
-
   gitHashes = {
     desktop_webview_window = "sha256-Z9ehzDKe1W3wGa2AcZoP73hlSwydggO6DaXd9mop+cM=";
     webview_windows = "sha256-9oWTvEoFeF7djEVA3PSM72rOmOMUhV8ZYuV6+RreNzE=";
@@ -94,8 +52,8 @@ flutter.buildFlutterApplication {
 
   postInstall = ''
     mkdir -p $out/share/applications/ $out/share/icons/hicolor/512x512/apps/
-    cp ./assets/linux/io.github.Predidit.Kazumi.desktop $out/share/applications
-    cp ./assets/images/logo/logo_linux.png $out/share/icons/hicolor/512x512/apps/io.github.Predidit.Kazumi.png
+    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
   '';
 
   meta = {
@@ -104,6 +62,6 @@ flutter.buildFlutterApplication {
     mainProgram = "kazumi";
     license = with lib.licenses; [ gpl3Plus ];
     maintainers = with lib.maintainers; [ aucub ];
-    platforms = lib.platforms.linux;
+    platforms = [ "x86_64-linux" ];
   };
 }
diff --git a/pkgs/by-name/ka/kazumi/pubspec.lock.json b/pkgs/by-name/ka/kazumi/pubspec.lock.json
index c8ef02337d05..3569d87f264f 100644
--- a/pkgs/by-name/ka/kazumi/pubspec.lock.json
+++ b/pkgs/by-name/ka/kazumi/pubspec.lock.json
@@ -210,11 +210,11 @@
       "dependency": "direct main",
       "description": {
         "name": "canvas_danmaku",
-        "sha256": "3e5f72c169484898b6a2e0022fa66753f6d70adfa3be25f45748037ae99c2010",
+        "sha256": "e5eebd19588cae528123fa14c0ad080fdc96881c3018f944f910024988ddb67e",
         "url": "https://pub.dev"
       },
       "source": "hosted",
-      "version": "0.2.1"
+      "version": "0.2.2"
     },
     "characters": {
       "dependency": "transitive",
@@ -955,11 +955,11 @@
       "dependency": "transitive",
       "description": {
         "name": "package_info_plus",
-        "sha256": "df3eb3e0aed5c1107bb0fdb80a8e82e778114958b1c5ac5644fb1ac9cae8a998",
+        "sha256": "da8d9ac8c4b1df253d1a328b7bf01ae77ef132833479ab40763334db13b91cce",
         "url": "https://pub.dev"
       },
       "source": "hosted",
-      "version": "8.1.0"
+      "version": "8.1.1"
     },
     "package_info_plus_platform_interface": {
       "dependency": "transitive",
@@ -1265,11 +1265,11 @@
       "dependency": "direct main",
       "description": {
         "name": "scrollview_observer",
-        "sha256": "fa408bcfd41e19da841eb53fc471f8f952d5ef818b854d2505c4bb3f0c876381",
+        "sha256": "8537ba32e5a15ade301e5c77ae858fd8591695defaad1821eca9eeb4ac28a157",
         "url": "https://pub.dev"
       },
       "source": "hosted",
-      "version": "1.22.0"
+      "version": "1.23.0"
     },
     "shared_preferences": {
       "dependency": "transitive",
@@ -1421,11 +1421,11 @@
       "dependency": "transitive",
       "description": {
         "name": "sqflite",
-        "sha256": "79a297dc3cc137e758c6a4baf83342b039e5a6d2436fcdf3f96a00adaaf2ad62",
+        "sha256": "2d7299468485dca85efeeadf5d38986909c5eb0cd71fd3db2c2f000e6c9454bb",
         "url": "https://pub.dev"
       },
       "source": "hosted",
-      "version": "2.4.0"
+      "version": "2.4.1"
     },
     "sqflite_android": {
       "dependency": "transitive",
@@ -1451,11 +1451,11 @@
       "dependency": "transitive",
       "description": {
         "name": "sqflite_darwin",
-        "sha256": "769733dddf94622d5541c73e4ddc6aa7b252d865285914b6fcd54a63c4b4f027",
+        "sha256": "96a698e2bc82bd770a4d6aab00b42396a7c63d9e33513a56945cbccb594c2474",
         "url": "https://pub.dev"
       },
       "source": "hosted",
-      "version": "2.4.1-1"
+      "version": "2.4.1"
     },
     "sqflite_platform_interface": {
       "dependency": "transitive",
@@ -1821,11 +1821,11 @@
       "dependency": "transitive",
       "description": {
         "name": "webview_flutter_android",
-        "sha256": "74693a212d990b32e0b7055d27db973a18abf31c53942063948cdfaaef9787ba",
+        "sha256": "dec83a8da0a2dcd8a25418534cc59348dbc2855fa1dd0cc929c62b6029fde392",
         "url": "https://pub.dev"
       },
       "source": "hosted",
-      "version": "4.0.0"
+      "version": "4.0.1"
     },
     "webview_flutter_platform_interface": {
       "dependency": "transitive",
@@ -1841,11 +1841,11 @@
       "dependency": "transitive",
       "description": {
         "name": "webview_flutter_wkwebview",
-        "sha256": "d4034901d96357beb1b6717ebf7d583c88e40cfc6eb85fe76dd1bf0979a9f251",
+        "sha256": "f14ee08021772fed913da8daebcfdeb46be457081e521e93e9918fe6cd1ce9e8",
         "url": "https://pub.dev"
       },
       "source": "hosted",
-      "version": "3.16.0"
+      "version": "3.16.1"
     },
     "webview_windows": {
       "dependency": "direct main",
@@ -1862,11 +1862,11 @@
       "dependency": "transitive",
       "description": {
         "name": "win32",
-        "sha256": "10169d3934549017f0ae278ccb07f828f9d6ea21573bab0fb77b0e1ef0fce454",
+        "sha256": "84ba388638ed7a8cb3445a320c8273136ab2631cd5f2c57888335504ddab1bc2",
         "url": "https://pub.dev"
       },
       "source": "hosted",
-      "version": "5.7.2"
+      "version": "5.8.0"
     },
     "win32_registry": {
       "dependency": "transitive",
diff --git a/pkgs/development/compilers/dart/package-source-builders/default.nix b/pkgs/development/compilers/dart/package-source-builders/default.nix
index 6fedb82c4421..58c560e2259b 100644
--- a/pkgs/development/compilers/dart/package-source-builders/default.nix
+++ b/pkgs/development/compilers/dart/package-source-builders/default.nix
@@ -2,6 +2,8 @@
 
 {
   flutter_secure_storage_linux = callPackage ./flutter-secure-storage-linux { };
+  flutter_volume_controller = callPackage ./flutter_volume_controller { };
+  fvp = callPackage ./fvp { };
   handy_window = callPackage ./handy-window { };
   matrix = callPackage ./matrix { };
   media_kit_libs_linux = callPackage ./media_kit_libs_linux { };
diff --git a/pkgs/development/compilers/dart/package-source-builders/flutter_volume_controller/default.nix b/pkgs/development/compilers/dart/package-source-builders/flutter_volume_controller/default.nix
new file mode 100644
index 000000000000..b582ac0448c0
--- /dev/null
+++ b/pkgs/development/compilers/dart/package-source-builders/flutter_volume_controller/default.nix
@@ -0,0 +1,25 @@
+{
+  stdenv,
+  mdk-sdk,
+}:
+
+{ version, src, ... }:
+
+stdenv.mkDerivation rec {
+  pname = "flutter_volume_controller";
+  inherit version src;
+  inherit (src) passthru;
+
+  postPatch = ''
+    substituteInPlace linux/CMakeLists.txt \
+      --replace-fail '# Include ALSA' 'find_package(PkgConfig REQUIRED)' \
+      --replace-fail 'find_package(ALSA REQUIRED)' 'pkg_check_modules(ALSA REQUIRED alsa)'
+  '';
+
+  installPhase = ''
+    runHook preInstall
+    mkdir $out
+    cp -r ./* $out/
+    runHook postInstall
+  '';
+}
diff --git a/pkgs/development/compilers/dart/package-source-builders/fvp/default.nix b/pkgs/development/compilers/dart/package-source-builders/fvp/default.nix
new file mode 100644
index 000000000000..4393d9825d4d
--- /dev/null
+++ b/pkgs/development/compilers/dart/package-source-builders/fvp/default.nix
@@ -0,0 +1,20 @@
+{
+  stdenv,
+  mdk-sdk,
+}:
+
+{ version, src, ... }:
+
+stdenv.mkDerivation rec {
+  pname = "fvp";
+  inherit version src;
+  inherit (src) passthru;
+
+  installPhase = ''
+    runHook preInstall
+    mkdir $out
+    tar -xf ${mdk-sdk.src} -C ./linux
+    cp -r ./* $out/
+    runHook postInstall
+  '';
+}