{
  lib,
  fetchurl,
  appimageTools,
  imagemagick,
}:

let
  pname = "lmstudio";
  version = "0.4.6-1";

  url = "https://installers.lmstudio.ai/linux/x64/${version}/LM-Studio-${version}-x64.AppImage";

  src = fetchurl {
    inherit url;
    hash = "sha256-FHZ64zmnqHrQyX4ift/lVUzW+HiCVkXpWVa4hkssX/k=";
  };

  contents = appimageTools.extractType2 { inherit pname version src; };
in
appimageTools.wrapType2 {
  inherit pname version src;

  nativeBuildInputs = [ imagemagick ];

  extraInstallCommands = ''
    set -euo pipefail

    mkdir -p "$out/share/applications"
    mkdir -p "$out/share/icons/hicolor/256x256/apps"

    # ---- desktop: create fresh, never edit in place ----
    desktopSrc="$(find "${contents}" -type f -name '*.desktop' | head -n1 || true)"
    if [ -n "$desktopSrc" ]; then
      tmp="$(mktemp)"

      # Rewrite keys deterministically; keep everything else.
      awk -v exec="${pname}" -v icon="${pname}" '
        BEGIN{hasExec=0;hasTry=0;hasIcon=0}
        /^Exec=/{print "Exec="exec; hasExec=1; next}
        /^TryExec=/{print "TryExec="exec; hasTry=1; next}
        /^Icon=/{print "Icon="icon; hasIcon=1; next}
        {print}
        END{
          if(!hasExec) print "Exec="exec
          if(!hasTry) print "TryExec="exec
          if(!hasIcon) print "Icon="icon
        }
      ' "$desktopSrc" > "$tmp"

      rm -f "$out/share/applications/${pname}.desktop"
      install -m444 "$tmp" "$out/share/applications/${pname}.desktop"
      rm -f "$tmp"
    fi

    # ---- icon: pick one, convert to canonical name ----
    icon=""
    for cand in \
      "${contents}/.DirIcon" \
      "${contents}/AppIcon.png" \
      "${contents}/usr/share/icons/hicolor/512x512/apps/"*.png \
      "${contents}/usr/share/icons/hicolor/256x256/apps/"*.png \
      ; do
      if [ -f "$cand" ]; then icon="$cand"; break; fi
    done
    if [ -z "$icon" ]; then
      icon="$(find "${contents}" -type f -name '*.png' | head -n1 || true)"
    fi

    if [ -n "$icon" ]; then
      magick "$icon" -resize 256x256 "$out/share/icons/hicolor/256x256/apps/${pname}.png"
    fi
  '';

  meta = with lib; {
    description = "LM Studio (AppImage)";
    homepage = "https://lmstudio.ai/";
    license = licenses.unfreeRedistributable;
    platforms = [ "x86_64-linux" ];
    mainProgram = pname;
  };
}