diff --git a/pkgs/applications/office/mytetra/default.nix b/pkgs/applications/office/mytetra/default.nix
index cb90af5244c6..5ffd178b055d 100644
--- a/pkgs/applications/office/mytetra/default.nix
+++ b/pkgs/applications/office/mytetra/default.nix
@@ -1,13 +1,14 @@
-{ lib, mkDerivation, fetchurl, qmake, qtsvg, makeWrapper, xdg-utils }:
+{ lib, mkDerivation, fetchFromGitHub, qmake, qtsvg, makeWrapper, xdg-utils }:
 
-let
-  version = "1.44.55";
-in mkDerivation {
+mkDerivation rec {
   pname = "mytetra";
-  inherit version;
-  src = fetchurl {
-    url = "https://github.com/xintrea/mytetra_dev/archive/v.${version}.tar.gz";
-    sha256 = "13lmfvschm1xwr0ys2ykhs0bb83m2f39rk1jdd7zf8yxlqki4i6l";
+  version = "1.44.55";
+
+  src = fetchFromGitHub {
+    owner = "xintrea";
+    repo = "mytetra_dev";
+    rev = "v.${version}";
+    sha256 = "sha256-jQXnDoLkqbDZxfsYKPDsTOE7p/BFeA8wEznpbkRVGdw=";
   };
 
   nativeBuildInputs = [ qmake makeWrapper ];