Nix expression for https://github.com/GuLinux/ScreenRotator/

screenrotator.nix

with import <nixpkgs> {};

qt5.mkDerivation rec {
  name = "screenrotator-r23";

  src = fetchFromGitHub {
    owner = "GuLinux";
    repo = "ScreenRotator";
    rev = "e1de8b72ad5eb9952db45c031e6c3292bfe028d2";
    sha256 = "08a3jrgq67iw32dbaqhm2ni0l2bj4fx5jvh7j2b47q02xkai2bn6";
  };

  meta = {
    description = "Automatic screen rotation daemon for X11";
    license = "GPL3";
  };

  nativeBuildInputs = [ extra-cmake-modules qt5.qttools ];

  buildInputs = [
    qt5.qtbase
    qt5.qtsensors
    qt5.qtx11extras
    xorg.libX11
    xorg.libXi
    xorg.libXrandr
  ];

  patches = [
    ./xdg.patch
  ];
}

xdg.patch

--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@@ -7,4 +7,3 @@
 install(FILES screenrotator.desktop DESTINATION share/applications)
 file(GLOB ICON_DIRECTORIES resources/*x*)
 install(DIRECTORY  ${ICON_DIRECTORIES} resources/scalable DESTINATION share/icons/hicolor/)
-install(FILES ${CMAKE_CURRENT_BINARY_DIR}/screenrotator-autostart.desktop DESTINATION /etc/xdg/autostart/)