From f27b1cf091e31840af9a8251d5035fcb4b26a528 Mon Sep 17 00:00:00 2001
From: Marius Bakke <mbakke@fastmail.com>
Date: Fri, 3 Apr 2020 18:26:47 +0200
Subject: gnu: ToME4: Fix build failure.

* gnu/packages/games.scm (tome4)[arguments]: Do not assume CPATH is set.
---
 gnu/packages/games.scm | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'gnu/packages/games.scm')

diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index f0f1886952..06d1b3c11c 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -5413,7 +5413,7 @@ (define-public tome4
                       (setenv "CPATH"
                               (string-append (assoc-ref inputs "sdl-union")
                                              "/include/SDL2:"
-                                             (getenv "CPATH")))
+                                             (or (getenv "CPATH") "")))
                       #t))
                   (delete 'check)
                   ;; premake doesn't provide install target
-- 
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