From e113909202ea059b0e1fd48cb8ad70e7e21cee22 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Thu, 14 Dec 2023 10:50:54 +0000
Subject: [PATCH] zeromq: fix MacOS references.

Needed after https://github.com/Homebrew/brew/pull/16306.
---
 Formula/z/zeromq.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Formula/z/zeromq.rb b/Formula/z/zeromq.rb
index 2dd393cf17bd..7235410c7086 100644
--- a/Formula/z/zeromq.rb
+++ b/Formula/z/zeromq.rb
@@ -37,7 +37,7 @@ class Zeromq < Formula
 
   def install
     # Work around "error: no member named 'signbit' in the global namespace"
-    if MacOS.version == :high_sierra
+    if OS.mac? && MacOS.version == :high_sierra
       ENV.delete("HOMEBREW_SDKROOT")
       ENV.delete("SDKROOT")
     end