patchelf overlay for shell.nix

shell.nix

{
  pkgs ? import <nixpkgs> {
    overlays = [(self: super: {
      # my_patchelf as patchelf is (I think) required for stdenv,
      # this otherwise makes it impossible to fetchFromGitHub as
      # replacing patchelf would replace the initial one.
      my_patchelf =
        super.patchelf.overrideAttrs({...}: with self; {
          # This could also realistically be:
          #   `src = ~/cool-stuff/patchelf/`
          # if you wanted to hack on a local version.
          src = fetchFromGitHub {
            owner = "NixOS";
            repo = "patchelf";
            rev = "e1e39f3639e39360ceebb2f7ed533cede4623070";
            sha256 = "09q1b1yqfzg1ih51v7qjh55vxfdbd8x5anycl8sfz6qy107wr02k";
          };
          # Required as this is otherwise done by the tarball build output.
          buildInputs = [ autoreconfHook ];
          # Only informational; not required.
          version = "0.10";
        })
      ;
    })];
  }
}:

pkgs.mkShell {
  buildInputs = with pkgs; [ my_patchelf ];
}