anchor.diff: -{ stdenv, lib, fetchFromGitHub, makeWrapper, cmake, pkgconfig
  +{ stdenv, lib, fetchFromGitHub, cmake, pkgconfig
   , boost, cereal, curl, eigen, expat, glew, libpng, tbb, wxGTK31
   , gtest, nlopt, xorg, makeDesktopItem
  +, cgal_5, gmp, ilmbase, mpfr, qhull, openvdb, systemd
   }:
  -let
  -  nloptVersion = if lib.hasAttr "version" nlopt
  -                 then lib.getAttr "version" nlopt
  -                 else "2.4";
  -in
   stdenv.mkDerivation rec {
     pname = "prusa-slicer";
  -  version = "2.1.1";
  +  version = "2.2.0";
   
     enableParallelBuilding = true;
   
     nativeBuildInputs = [
       cmake
  -    makeWrapper
       pkgconfig
     ];
   
     buildInputs = [
       boost
       cereal
  +    cgal_5
       curl
       eigen
       expat
       glew
  +    gmp
  +    ilmbase
       libpng
  +    mpfr
  +    nlopt
  +    openvdb
  +    systemd
       tbb
       wxGTK31
       xorg.libX11
  
positive.code:   checkInputs = [ gtest ];
  
    # The build system uses custom logic - defined in
    # xs/src/libnest2d/cmake_modules/FindNLopt.cmake in the package source -
    # for finding the nlopt library, which doesn't pick up the package in the nix store.
    # We need to set the path via the NLOPT environment variable instead.
    NLOPT = nlopt;
  
    # Disable compiler warnings that clutter the build log
    # It seems to be a known issue for Eigen:
    # http://eigen.tuxfamily.org/bz/show_bug.cgi?id=1221
    NIX_CFLAGS_COMPILE = "-Wno-ignored-attributes";
  
    prePatch = ''
      # In nix ioctls.h isn't available from the standard kernel-headers package
      # like in other distributions. The copy in glibc seems to be identical to the
      # one in the kernel though, so we use that one instead.
      sed -i 's|"/usr/include/asm-generic/ioctls.h"|<asm-generic/ioctls.h>|g' src/libslic3r/GCodeSender.cpp
    '' + lib.optionalString (lib.versionOlder "2.5" nloptVersion) ''
      # Since version 2.5.0 of nlopt we need to link to libnlopt, as libnlopt_cxx
      # now seems to be integrated into the main lib.
      sed -i 's|nlopt_cxx|nlopt|g' src/libnest2d/cmake_modules/FindNLopt.cmake
    '';
  
    src = fetchFromGitHub {
      owner = "prusa3d";
      repo = "PrusaSlicer";
      sha256 = "0i393nbc2salb4j5l2hvy03ng7hmf90d2xj653pw9bsikhj0r3jd";
      rev = "version_${version}";
    };
  
  
negative.code:     description = "G-code generator for 3D printer";
      homepage = https://github.com/prusa3d/PrusaSlicer;
      license = licenses.agpl3;
      maintainers = with maintainers; [ moredread tweber ];
    };
  }
  