$NetBSD: patch-Makefile,v 1.5 2025/01/07 04:17:20 riastradh Exp $

Avoid `env -u', which isn't available on all platforms.

--- Makefile.orig	2024-05-10 15:37:14.000000000 +0000
+++ Makefile
@@ -182,10 +182,10 @@ err_if_empty = $(if $(strip $($(1))),$(s
 # Windows and Mac (both podman-remote client only) require CGO_ENABLED=0.
 CGO_ENABLED ?= 1
 # Default to the native OS type and architecture unless otherwise specified
-NATIVE_GOOS := $(shell env -u GOOS $(GO) env GOOS)
+NATIVE_GOOS := $(shell unset GOOS; $(GO) env GOOS)
 GOOS ?= $(call err_if_empty,NATIVE_GOOS)
 # Default to the native architecture type
-NATIVE_GOARCH := $(shell env -u GOARCH $(GO) env GOARCH)
+NATIVE_GOARCH := $(shell unset GOARCH; $(GO) env GOARCH)
 GOARCH ?= $(NATIVE_GOARCH)
 ifeq ($(call err_if_empty,GOOS),windows)
 BINSFX := .exe