anchor.diff: -{ lib, stdenv, meson, ninja, vala, gettext, itstool, fetchurl, pkg-config, libxml2
  -, gtk3, glib, gtksourceview4, wrapGAppsHook, gobject-introspection, python3
  -, gnome3, mpfr, gmp, libsoup, libmpc, gsettings-desktop-schemas, libgee }:
  +{ stdenv
  +, lib
  +, meson
  +, ninja
  +, vala
  +, gettext
  +, itstool
  +, fetchurl
  +, pkg-config
  +, libxml2
  +, gtk3
  +, glib
  +, gtksourceview4
  +, wrapGAppsHook
  +, gobject-introspection
  +, python3
  +, gnome3
  +, mpfr
  +, gmp
  +, libsoup
  +, libmpc
  +, libhandy
  +, gsettings-desktop-schemas
  +, libgee
  +}:
   
   stdenv.mkDerivation rec {
     pname = "gnome-calculator";
  -  version = "3.38.2";
  +  version = "40.1";
   
     src = fetchurl {
  -    url = "mirror://gnome/sources/gnome-calculator/${lib.versions.majorMinor version}/${pname}-${version}.tar.xz";
  -    sha256 = "0sri58cp6v07cqpdsf8dhf9dnykz305kvkx0l9dd25g06djcr0wc";
  +    url = "mirror://gnome/sources/gnome-calculator/${lib.versions.major version}/${pname}-${version}.tar.xz";
  +    sha256 = "1xkazxbkpn1z5pfphhps7fc5q4yc8lp7f6b222n8bx5iyxhwbrkz";
     };
   
     nativeBuildInputs = [
  -    meson ninja pkg-config vala gettext itstool wrapGAppsHook python3
  +    meson
  +    ninja
  +    pkg-config
  +    vala
  +    gettext
  +    itstool
  +    wrapGAppsHook
  +    python3
       gobject-introspection # for finding vapi files
     ];
   
     buildInputs = [
  -    gtk3 glib libxml2 gtksourceview4 mpfr gmp
  -    gnome3.adwaita-icon-theme libgee
  -    gsettings-desktop-schemas libsoup libmpc
  +    gtk3
  +    glib
  +    libxml2
  +    gtksourceview4
  +    mpfr
  +    gmp
  +    gnome3.adwaita-icon-theme
  +    libgee
  +    gsettings-desktop-schemas
  +    libsoup
  +    libmpc
  +    libhandy
     ];
   
     doCheck = true;
  
positive.code:     homepage = "https://wiki.gnome.org/Apps/Calculator";
      description = "Application that solves mathematical equations and is suitable as a default application in a Desktop environment";
      maintainers = teams.gnome.members;
      license = licenses.gpl3;
      platforms = platforms.linux;
    };
  }
  
negative.code:   postPatch = ''
      chmod +x meson_post_install.py # patchShebangs requires executable file
      patchShebangs meson_post_install.py
    '';
  
    preCheck = ''
      # Currency conversion test tries to store currency data in $HOME/.cache.
      export HOME=$TMPDIR
    '';
  
    passthru = {
  