--- crate_universe/src/metadata/cargo_tree_rustc_wrapper.sh
+++ crate_universe/src/metadata/cargo_tree_rustc_wrapper.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!@bash@
 #
 # For details, see:
 # `@rules_rust//crate_universe/src/metadata/cargo_tree_resolver.rs - TreeResolver::create_rustc_wrapper`

--- util/process_wrapper/private/process_wrapper.sh
+++ util/process_wrapper/private/process_wrapper.sh
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash
+#!@bash@
 
 set -euo pipefail