make-wrapper should use runtimeShell, not bash, for cross-compilation

pkgs/build-support/setup-hooks/make-wrapper.sh

@@ -40,7 +40,7 @@ makeWrapper() {
 
     mkdir -p "$(dirname "$wrapper")"
 
-    echo "#! $SHELL -e" > "$wrapper"
+    echo "#! @shell@ -e" > "$wrapper"
 
     params=("$@")
     for ((n = 2; n < ${#params[*]}; n += 1)); do

pkgs/top-level/all-packages.nix

@@ -356,7 +356,7 @@ with pkgs;
       inherit contents compressor prepend;
     };
 
-  makeWrapper = makeSetupHook { deps = [ dieHook ]; }
+  makeWrapper = makeSetupHook { deps = [ dieHook ]; substitutions = { shell = pkgs.runtimeShell; }; }
                               ../build-support/setup-hooks/make-wrapper.sh;
 
   makeModulesClosure = { kernel, firmware, rootModules, allowMissing ? false }: