ssh-ident: change PATH

The wrapper is not working anymore, so the ssh-agent is no more shared,
as the script removes the environment PATH variable, I pinned the
ssh-agent binary and removed the wrapper.

Also, as this script doesn't require a compiler, I switched from stdenv
to stdenvNoCC.

pkgs/tools/networking/ssh-ident/default.nix

···
-{ stdenv, lib, fetchFromGitHub, python3, makeWrapper, openssh }:
+{ stdenvNoCC, lib, fetchFromGitHub, python3, openssh}:
 
-stdenv.mkDerivation {
+stdenvNoCC.mkDerivation {
   pname = "ssh-ident";
   version = "2016-04-21";
   src = fetchFromGitHub  {
···
     sha256 = "1jf19lz1gwn7cyp57j8d4zs5bq13iw3kw31m8nvr8h6sib2pf815";
   };
 
-  buildInputs = [ python3 makeWrapper ];
+  postPatch = ''
+    substituteInPlace ssh-ident \
+      --replace 'ssh-agent >' '${openssh}/bin/ssh-agent >'
+  '';
+  buildInputs = [ python3 ];
+
   installPhase = ''
     mkdir -p $out/bin
     install -m 755 ssh-ident $out/bin/ssh-ident
-    wrapProgram $out/bin/ssh-ident \
-      --prefix PATH : ${lib.makeBinPath [ openssh  ]}
   '';
 
-  meta = {
+  meta = with lib; {
     homepage = "https://github.com/ccontavalli/ssh-ident";
     description = "Start and use ssh-agent and load identities as necessary";
-    license = lib.licenses.bsd2;
-    maintainers = with lib.maintainers; [ telotortium ];
-    platforms = with lib.platforms; unix;
+    license = licenses.bsd2;
+    maintainers = with maintainers; [ telotortium ];
+    platforms = with platforms; unix;
   };
 }