rust-bindgen: Resolve "/usr/bin/env bash" to fix usage in Nix build

pkgs/development/tools/rust/bindgen/default.nix

@@ -1,5 +1,7 @@
-{ lib, stdenv, fetchFromGitHub, rustPlatform, clang, llvmPackages, rustfmt, writeScriptBin,
-  runtimeShell }:
+{ lib, stdenv, fetchFromGitHub, rustPlatform, clang, llvmPackages, rustfmt, writeScriptBin
+, runtimeShell
+, bash
+}:
 
 rustPlatform.buildRustPackage rec {
   pname = "rust-bindgen";
@@ -16,7 +18,9 @@ rustPlatform.buildRustPackage rec {
 
   cargoSha256 = "1dv1ywdy701bnc2jv5jq0hnpal1snlizaj9w6k1wxyrp9szjd48w";
 
-  libclang = llvmPackages.libclang.lib; #for substituteAll
+  #for substituteAll
+  libclang = llvmPackages.libclang.lib;
+  inherit bash;
 
   buildInputs = [ libclang ];
 

pkgs/development/tools/rust/bindgen/wrapper.sh

@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!@bash@/bin/bash
 sep='--'   # whether to add -- before new options
 cxx=0      # whether cxx was explicitly requested
 lastWasx=0 # whether the last argument passed was -x