Add JSON package to gitolite environment. (#127683)

Co-authored-by: Sandro <[e-mail]>
Co-authored-by: Lassulus <[e-mail]>

pkgs/applications/version-management/gitolite/default.nix

···
-{ stdenv, fetchFromGitHub, git, lib, makeWrapper, nettools, perl }:
+{ stdenv, fetchFromGitHub, git, lib, makeWrapper, nettools, perl, perlPackages }:
 
 stdenv.mkDerivation rec {
   pname = "gitolite";
···
 
   postFixup = ''
     wrapProgram $out/bin/gitolite-shell \
-      --prefix PATH : ${lib.makeBinPath [ git perl ]}
+      --prefix PATH : ${lib.makeBinPath [ git (perl.withPackages (p: [ p.JSON ])) ]}
   '';
 
   installPhase = ''