Port go-mtpfs to buildGoPackage

pkgs/tools/filesystems/go-mtpfs/default.nix

@@ -1,57 +1,21 @@
-{ stdenv, lib, pkgconfig, libmtp, go, fetchFromGitHub }:
+{ lib, goPackages, pkgconfig, libmtp, fetchFromGitHub }:
 
-let
-  goDeps = [
-    {
-      root = "github.com/hanwen/go-mtpfs";
-      src = fetchFromGitHub {
-        owner = "hanwen";
-        repo = "go-mtpfs";
-        rev = "9c2b46050e8ea8574eaec2124867ac7b11e6471d";
-        sha256 = "0kxi18cb078q4wikfajp3yvp802wzfsfdp431j0dg2jdw8y7gfii";
-      };
-    }
-    {
-      root = "github.com/hanwen/go-fuse";
-      src = fetchFromGitHub {
-        owner = "hanwen";
-        repo = "go-fuse";
-        rev = "5d16aa11eef4643de2d91e88a64dcb6138705d58";
-        sha256 = "0lycfhchn88kbs81ypz8m5jh032fpbv14gldrjirf32wm1d4f8pj";
-      };
-    }
-    {
-      root = "github.com/hanwen/usb";
-      src = fetchFromGitHub {
-        owner = "hanwen";
-        repo = "usb";
-        rev = "69aee4530ac705cec7c5344418d982aaf15cf0b1";
-        sha256 = "01k0c2g395j65vm1w37mmrfkg6nm900khjrrizzpmx8f8yf20dky";
-      };
-    }
-  ];
+with goPackages;
 
-  sources = stdenv.mkDerivation rec {
-    name = "go-deps";
-    buildCommand =
-      lib.concatStrings
-        (map (dep: ''
-                mkdir -p $out/src/`dirname ${dep.root}`
-                ln -s ${dep.src} $out/src/${dep.root}
-              '') goDeps);
+buildGoPackage rec {
+  rev = "9c2b46050e8ea8574eaec2124867ac7b11e6471d";
+  name = "go-mtpfs-${lib.strings.substring 0 7 rev}";
+  goPackagePath = "github.com/hanwen/go-mtpfs";
+  src = fetchFromGitHub {
+    inherit rev;
+    owner = "hanwen";
+    repo = "go-mtpfs";
+    sha256 = "0kxi18cb078q4wikfajp3yvp802wzfsfdp431j0dg2jdw8y7gfii";
   };
-in stdenv.mkDerivation rec {
-  name = "go-mtpfs";
 
-  src = sources;
+  buildInputs = [ go-fuse libmtp usb ];
 
-  buildInputs = [ go pkgconfig libmtp ];
-
-  installPhase = ''
-    mkdir -p $out/bin
-    export GOPATH=$src
-    go build -v -o $out/bin/go-mtpfs github.com/hanwen/go-mtpfs
-  '';
+  subPackages = [ "./" ];
 
   meta = with lib; {
     description = "A simple FUSE filesystem for mounting Android devices as a MTP device";