diff --git a/default.nix b/default.nix
index ed14114..a6e2c7d 100644
--- a/default.nix
+++ b/default.nix
@@ -1,57 +1,7 @@
-{pkgs ? import <nixpkgs> {}}: let
-  cargoRoot = "src-tauri";
-  src = ./.;
-
-  patchSassEmbedded = pkgs.writeShellScriptBin "patch-sass-embedded" ''
-    NIX_LD="$(cat ${pkgs.stdenv.cc}/nix-support/dynamic-linker)"
-    for dart_bin in node_modules/sass-embedded-linux-*/dart-sass/src/dart; do
-      if [ -f "$dart_bin" ]; then
-        ${pkgs.patchelf}/bin/patchelf --set-interpreter "$NIX_LD" "$dart_bin"
-      fi
-    done
-  '';
-in
-  pkgs.rustPlatform.buildRustPackage {
-    pname = "creamlinux-installer";
-    version = "1.5.0-unstable-2026-04-23";
-    inherit src;
-
-    cargoLock.lockFile = ./src-tauri/Cargo.lock;
-
-    npmDeps = pkgs.fetchNpmDeps {
-      inherit src;
-      hash = "sha256-anYTERlnfOGDsGW0joy+h7wECJNDy6q+0a2to6t36pg=";
-    };
-
-    nativeBuildInputs =
-      [
-        pkgs.cargo-tauri.hook
-        pkgs.nodejs
-        pkgs.npmHooks.npmConfigHook
-        pkgs.pkg-config
-      ]
-      ++ pkgs.lib.optionals pkgs.stdenv.isLinux [
-        pkgs.wrapGAppsHook4
-      ];
-
-    buildInputs = pkgs.lib.optionals pkgs.stdenv.isLinux [
-      pkgs.glib-networking
-      pkgs.openssl
-      pkgs.webkitgtk_4_1
-    ];
-
-    inherit cargoRoot;
-
-    buildAndTestSubdir = cargoRoot;
-
-    postPatch = ''
-      substituteInPlace src-tauri/tauri.conf.json \
-        --replace-fail '"createUpdaterArtifacts": true' '"createUpdaterArtifacts": false'
-    '';
-
-    preBuild = ''
-      ${patchSassEmbedded}/bin/patch-sass-embedded
-    '';
-
-    env.NO_STRIP = true;
-  }
+{
+  pkgs ?
+    import
+      (fetchTarball "https://github.com/NixOS/nixpkgs/archive/c6d65881c5624c9cae5ea6cedef24699b0c0a4c0.tar.gz")
+      { },
+}:
+pkgs.callPackage ./package.nix { }
diff --git a/package.nix b/package.nix
new file mode 100644
index 0000000..227848a
--- /dev/null
+++ b/package.nix
@@ -0,0 +1,72 @@
+{
+  cargo-tauri,
+  writeShellScriptBin,
+  stdenv,
+  patchelf,
+  rustPlatform,
+  fetchNpmDeps,
+  nodejs,
+  npmHooks,
+  pkg-config,
+  lib,
+  wrapGAppsHook4,
+  glib-networking,
+  openssl,
+  webkitgtk_4_1,
+}:
+let
+  cargoRoot = "src-tauri";
+  src = ./.;
+
+  patchSassEmbedded = writeShellScriptBin "patch-sass-embedded" ''
+    NIX_LD="$(cat ${stdenv.cc}/nix-support/dynamic-linker)"
+    for dart_bin in node_modules/sass-embedded-linux-*/dart-sass/src/dart; do
+      if [ -f "$dart_bin" ]; then
+        ${patchelf}/bin/patchelf --set-interpreter "$NIX_LD" "$dart_bin"
+      fi
+    done
+  '';
+in
+rustPlatform.buildRustPackage {
+  pname = "creamlinux-installer";
+  version = "1.5.5-unstable-2026-05-03";
+  inherit src;
+
+  cargoLock.lockFile = ./src-tauri/Cargo.lock;
+
+  npmDeps = fetchNpmDeps {
+    inherit src;
+    hash = "sha256-9VUywt71u4kuHNCFxW2aiavqM7e6tvBMHyzeSdJIJ5o=";
+  };
+
+  nativeBuildInputs = [
+    cargo-tauri.hook
+    nodejs
+    npmHooks.npmConfigHook
+    pkg-config
+  ]
+  ++ lib.optionals stdenv.isLinux [
+    wrapGAppsHook4
+  ];
+
+  buildInputs = lib.optionals stdenv.isLinux [
+    glib-networking
+    openssl
+    webkitgtk_4_1
+  ];
+
+  inherit cargoRoot;
+
+  buildAndTestSubdir = cargoRoot;
+
+  postPatch = ''
+    substituteInPlace src-tauri/tauri.conf.json \
+      --replace-fail '"createUpdaterArtifacts": true' '"createUpdaterArtifacts": false'
+  '';
+
+  preBuild = ''
+    ${patchSassEmbedded}/bin/patch-sass-embedded
+  '';
+
+  env.NO_STRIP = true;
+}