From 17992ab796e4316cc47176d1dcf081380ac4a0c9 Mon Sep 17 00:00:00 2001
From: Andreas Schneider <asn@cryptomilk.org>
Date: Sat, 13 Jan 2024 21:29:09 +0100
Subject: [PATCH] fix: Use os_uname() to check for Linux

In build environments like Fedora's mockbuild, there is no OSTYPE
environment variable set. Use a more secure method to detect Linux.
---
 lib/utils.lua | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/utils.lua b/lib/utils.lua
index 3bbc99ec..4dbf1303 100644
--- a/lib/utils.lua
+++ b/lib/utils.lua
@@ -20,8 +20,8 @@ else
   -- Normal lua will only have \ for path separator on windows.
   utils.isWindows = package.config:find("\\") and true or false
   if not utils.isWindows then
-    local _os = os.getenv('RUNNER_OS') or os.getenv('OSTYPE')
-    if (_os and _os:lower():match('linux')) then
+    local os = uv.os_uname()
+    if os.sysname == "Linux" then
       utils.isLinux = true
     end
   end