symlinks: switch to fetchFromGitHub

pkgs/tools/system/symlinks/default.nix

@@ -1,12 +1,14 @@
-{ fetchurl, lib, stdenv }:
+{ fetchFromGitHub, lib, stdenv }:
 
 stdenv.mkDerivation rec {
   pname = "symlinks";
   version = "1.4.3";
 
-  src = fetchurl {
-    url = "https://github.com/brandt/symlinks/archive/v${version}.tar.gz";
-    sha256 = "1cihrd3dap52z1msdhhgda7b7wy1l5ysfvyba8yxb3zjk0l5n417";
+  src = fetchFromGitHub {
+    owner = "brandt";
+    repo = "symlinks";
+    rev = "v${version}";
+    sha256 = "EMWd7T/k4v1uvXe2QxhyPoQKUpKIUANE9AOwX461FgU=";
   };
 
   buildFlags = [ "CC=${stdenv.cc}/bin/cc" ];