From 3549e23b25303d46f4725628a50c2a302d5e59f3 Mon Sep 17 00:00:00 2001
From: Marius Bakke <mbakke@fastmail.com>
Date: Tue, 16 Jul 2019 20:10:17 +0200
Subject: gnu: nanopolish: Fix build with GCC 7.

* gnu/packages/bioinformatics.scm (nanopolish)[arguments]: Preserve the
existing CPATH variable, if any.
---
 gnu/packages/bioinformatics.scm | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/gnu/packages/bioinformatics.scm b/gnu/packages/bioinformatics.scm
index 1372bb411a..313ffa11ae 100644
--- a/gnu/packages/bioinformatics.scm
+++ b/gnu/packages/bioinformatics.scm
@@ -14072,7 +14072,8 @@ choosing which reads pass the filter.")
              (lambda* (#:key inputs #:allow-other-keys)
                (setenv "CPATH"
                        (string-append (assoc-ref inputs "eigen")
-                                      "/include/eigen3"))
+                                      "/include/eigen3:"
+                                      (or (getenv "CPATH") "")))
                #t))
            (delete 'configure)
            (replace 'install
-- 
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