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-rw-r--r--gnu/packages/education.scm3
1 files changed, 2 insertions, 1 deletions
diff --git a/gnu/packages/education.scm b/gnu/packages/education.scm
index f3d8907583..493a97fdf8 100644
--- a/gnu/packages/education.scm
+++ b/gnu/packages/education.scm
@@ -83,7 +83,8 @@
            (lambda* (#:key inputs #:allow-other-keys)
              (setenv "CPATH"
                      (string-append (assoc-ref inputs "sdl-mixer")
-                                    "/include/SDL"))
+                                    "/include/SDL:"
+                                    (or (getenv "CPATH") "")))
              #t)))))
     (inputs
      `(("gtk+" ,gtk+-2)