shellhub-agent: Fix scp support

We need to have access to the scp binary so we can use it to the
transfer of files or the file transfer fails to run.

Signed-off-by: Otavio Salvador <otavio@ossystems.com.br>

pkgs/applications/networking/shellhub-agent/default.nix

@@ -3,6 +3,8 @@
 , fetchFromGitHub
 , genericUpdater
 , common-updater-scripts
+, makeWrapper
+, openssh
 }:
 
 buildGoModule rec {
@@ -31,6 +33,12 @@ buildGoModule rec {
     };
   };
 
+  nativeBuildInputs = [ makeWrapper ];
+
+  postInstall = ''
+    wrapProgram $out/bin/agent --prefix PATH : ${lib.makeBinPath [ openssh ]}
+  '';
+
   meta = with lib; {
     description =
       "Enables easy access any Linux device behind firewall and NAT";