--- bmake/install-sh.orig	2020-02-15 15:51:24.856000000 +0000
+++ bmake/install-sh	2020-02-20 15:52:47.596000000 +0000
@@ -1,3 +1,4 @@
+#!/bin/sh
 :
 # NAME:
 #	install.sh - portable version of install(1)
--- bmake/makefile.in.orig	2022-12-26 19:16:39.881930779 +0100
+++ bmake/makefile.in	2023-03-23 18:09:58.883692945 +0100
@@ -9,6 +9,6 @@
 all: build
 
 build clean install test:
-	${srcdir}/boot-strap --prefix=${prefix} -o . op=$@
+	MAKEFLAGS="${MAKEFLAGS%*--jobserver-auth=[0-9],[0=9]*}" ${srcdir}/boot-strap --prefix=${prefix} -o . op=$@