+ (add-after 'set-paths 'augment-CPLUS_INCLUDE_PATH
+ (lambda* (#:key inputs #:allow-other-keys)
+ (let ((gcc (assoc-ref inputs "gcc")))
+ ;; Remove the default compiler from CPLUS_INCLUDE_PATH to
+ ;; prevent header conflict with the GCC from native-inputs.
+ (setenv "CPLUS_INCLUDE_PATH"
+ (string-join
+ (delete (string-append gcc "/include/c++")
+ (string-split (getenv "CPLUS_INCLUDE_PATH")
+ #\:))
+ ":"))
+ (format #t
+ "environment variable `CPLUS_INCLUDE_PATH' changed to ~a~%"
+ (getenv "CPLUS_INCLUDE_PATH"))
+ #t)))