anchor.diff:  
     cargoSha256 = "sha256-idItRkymr+cxk3zv2mPBR/frCGvzEUdSAhY7gghfR3M=";
   
  -  nativeBuildInputs = [ makeWrapper ];
  +  nativeBuildInputs = [ installShellFiles makeWrapper ];
   
     postInstall = ''
       # not needed at runtime
  
positive.code: { fetchzip, lib, rustPlatform, makeWrapper }:
  
  rustPlatform.buildRustPackage rec {
    pname = "helix";
  
negative.code: 
      mkdir -p $out/lib
      cp -r runtime $out/lib
      installShellCompletion contrib/completion/hx.{bash,fish,zsh}
    '';
    postFixup = ''
      wrapProgram $out/bin/hx --set HELIX_RUNTIME $out/lib/runtime
  