mytetra: switch to fetchFromGitHub

pkgs/applications/office/mytetra/default.nix

···
-{ lib, mkDerivation, fetchurl, qmake, qtsvg, makeWrapper, xdg-utils }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qtsvg, makeWrapper, xdg-utils }:
 
-let
+mkDerivation rec {
+  pname = "mytetra";
   version = "1.44.55";
-in mkDerivation {
-  pname = "mytetra";
-  inherit version;
-  src = fetchurl {
-    url = "https://github.com/xintrea/mytetra_dev/archive/v.${version}.tar.gz";
-    sha256 = "13lmfvschm1xwr0ys2ykhs0bb83m2f39rk1jdd7zf8yxlqki4i6l";
+
+  src = fetchFromGitHub {
+    owner = "xintrea";
+    repo = "mytetra_dev";
+    rev = "v.${version}";
+    sha256 = "sha256-jQXnDoLkqbDZxfsYKPDsTOE7p/BFeA8wEznpbkRVGdw=";
   };
 
   nativeBuildInputs = [ qmake makeWrapper ];