azure-vhd-utils: switch to fetchFromGitHub

pkgs/tools/misc/azure-vhd-utils/default.nix

@@ -1,17 +1,16 @@
-# This file was generated by go2nix.
-{ lib, buildGoPackage, fetchgit }:
+{ lib, buildGoPackage, fetchFromGitHub }:
 
 buildGoPackage rec {
   pname = "azure-vhd-utils";
-  version = "20160614-${lib.strings.substring 0 7 rev}";
-  rev = "070db2d701a462ca2edcf89d677ed3cac309d8e8";
+  version = "unstable-2016-06-14";
 
   goPackagePath = "github.com/Microsoft/azure-vhd-utils";
 
-  src = fetchgit {
-    inherit rev;
-    url = "https://github.com/Microsoft/azure-vhd-utils";
-    sha256 = "0b9kbavlb92rhnb1swwq8bdn4l9a994rmf1ywyfq4yc0kd3gnhgh";
+  src = fetchFromGitHub {
+    owner = "Microsoft";
+    repo = "azure-vhd-utils";
+    rev = "070db2d701a462ca2edcf89d677ed3cac309d8e8";
+    sha256 = "sha256-8EH7RpuAeYKd5z64mklKKlFi20KYcx2WhVmkRbdaMy0=";
   };
 
   goDeps = ./deps.nix;