helmfile: fix sub package

pkgs/applications/networking/cluster/helmfile/default.nix

@@ -1,10 +1,8 @@
-{ lib, buildGoModule, fetchFromGitHub, makeWrapper, kubernetes-helm, ... }:
+{ lib, buildGoModule, fetchFromGitHub, makeWrapper, kubernetes-helm }:
 
-let version = "0.119.0"; in
-
-buildGoModule {
+buildGoModule rec {
   pname = "helmfile";
-  inherit version;
+  version = "0.119.0";
 
   src = fetchFromGitHub {
     owner = "roboll";
@@ -13,16 +11,13 @@ buildGoModule {
     sha256 = "067hlzp87g36wgxankrmd2nva1v40pa31acq1hh0jxyxp98sfgk1";
   };
 
-  goPackagePath = "github.com/roboll/helmfile";
-
   vendorSha256 = "11bw10s5wifzw2cy1100hyjv4xv7an7b05lcw6sphwyy56gsp2fy";
 
   nativeBuildInputs = [ makeWrapper ];
 
-  buildFlagsArray = ''
-    -ldflags=
-    -X main.Version=${version}
-  '';
+  subPackages = [ "." ];
+
+  buildFlagsArray = [ "-ldflags=-s -w -X github.com/roboll/helmfile/pkg/app/version.Version=${version}" ];
 
   postInstall = ''
     wrapProgram $out/bin/helmfile \