Port flannel to buildGoPackage

pkgs/tools/networking/flannel/default.nix

@@ -1,26 +1,19 @@
-{ stdenv, lib, go, fetchurl, fetchgit, fetchhg, fetchbzr, fetchFromGitHub }:
+{ lib, goPackages, fetchFromGitHub }:
 
-stdenv.mkDerivation rec {
+with goPackages;
+
+buildGoPackage rec {
   version = "0.1.0";
   name = "flannel-${version}";
-
-  src = import ./deps.nix {
-    inherit stdenv lib fetchFromGitHub;
+  goPackagePath = "github.com/coreos/flannel";
+  src = fetchFromGitHub {
+    owner = "coreos";
+    repo = "flannel";
+    rev = "v${version}";
+    sha256 = "1f7x6a2c8ix6j5y1r0dq56b58bl2rs2ycbdqb9fz5zv1zk2w20rd";
   };
 
-  buildInputs = [ go ];
-
-  buildPhase = ''
-    export GOPATH=$src
-    go build -v -o flannel github.com/coreos/flannel
-  '';
-
-  installPhase = ''
-    mkdir -p $out/bin
-    mv flannel $out/bin/flannel
-  '';
-
-  meta = with stdenv.lib; {
+  meta = with lib; {
     description = "Flannel is an etcd backed network fabric for containers";
     homepage = https://github.com/coreos/flannel;
     license = licenses.asl20;