{prev}:
prev.snipe-it.overrideAttrs (oldAttrs: rec {
  version = "8.6.3";

  src = prev.fetchFromGitHub {
    owner = "grokability";
    repo = "snipe-it";
    tag = "v${version}";
    hash = "sha256-Y1TNZ4uMK9ryKjKzFwW6Im1I2oRspFUXQI88lVi+FKg=";
  };

  vendorHash = "sha256-SJWWV1XWnwKe1XShTJfhWrEWTpTtrKFoNb27RGwW6v8=";

  postInstall =
    ''
      snipe_it_out="$out/share/php/snipe-it"
      mkdir -p $out/share/snipe-it

      # Alle Default-Uploads sichern (z.B. default.png) bevor das
      # ursprüngliche postInstall das Verzeichnis mit rm -R löscht.
      cp -r $snipe_it_out/public/uploads $out/share/snipe-it/uploads
    ''
    + oldAttrs.postInstall;
})