anchor.diff: -{ stdenv, lib, makeWrapper, fetchurl
  -, dpkg, wrapGAppsHook, autoPatchelfHook
  -, gtk3, cairo, pango, atk, gdk-pixbuf, glib
  -, at-spi2-atk, dbus, libX11, libxcb, libXi
  -, libXcursor, libXdamage, libXrandr, libXcomposite
  -, libXext, libXfixes, libXrender, libXtst, libXScrnSaver
  -, nss, nspr, alsaLib, cups, fontconfig, expat
  -, libudev0-shim, glibc, curl, openssl, libnghttp2, gsettings-desktop-schemas }:
  +{ stdenv
  +, lib
  +, makeWrapper
  +, fetchurl
  +, dpkg
  +, wrapGAppsHook
  +, autoPatchelfHook
  +, gtk3
  +, cairo
  +, pango
  +, atk
  +, gdk-pixbuf
  +, glib
  +, at-spi2-atk
  +, dbus
  +, libX11
  +, libxcb
  +, libXi
  +, libXcursor
  +, libXdamage
  +, libXrandr
  +, libXcomposite
  +, libXext
  +, libXfixes
  +, libXrender
  +, libXtst
  +, libXScrnSaver
  +, nss
  +, nspr
  +, alsaLib
  +, cups
  +, fontconfig
  +, expat
  +, libudev0-shim
  +, glibc
  +, curl
  +, openssl
  +, libnghttp2
  +, gsettings-desktop-schemas
  +, libdrm
  +, mesa
  +}:
   
   
   stdenv.mkDerivation rec {
     pname = "polar-bookshelf";
  -  version = "2.0.42";
  +  version = "2.0.103";
   
     # fetching a .deb because there's no easy way to package this Electron app
     src = fetchurl {
       url = "https://github.com/burtonator/polar-bookshelf/releases/download/v${version}/polar-desktop-app-${version}-amd64.deb";
  -    hash = "sha256-JyO71wyE6b0iHAYs/6/WbG+OdUVUUPpJla+ZUzg0Gng=";
  +    hash = "sha256-jcq0hW698bAhVM3fLQQeKAnld33XLkHsGjS3QwUpciQ=";
     };
   
     buildInputs = [
  +    libdrm
  +    mesa
       gsettings-desktop-schemas
       glib
       gtk3
  
positive.code:   unpackPhase = "dpkg-deb -x $src .";
  
    installPhase = ''
      mkdir -p $out/share/polar-bookshelf
      mkdir -p $out/bin
      mkdir -p $out/lib
  
negative.code: 
      substituteInPlace $out/share/applications/polar-desktop-app.desktop \
        --replace "/opt/Polar/polar-desktop-app" "$out/bin/polar-desktop-app"
  
      runHook postInstall
    '';
  
    preFixup = ''
  