# Pastebin xhxa8KZp
diff --git a/gnu/packages/installers.scm b/gnu/packages/installers.scm
index c987254d61..04c708841e 100644
--- a/gnu/packages/installers.scm
+++ b/gnu/packages/installers.scm
@@ -92,7 +92,9 @@
                              ;; CROSS_-prefixed version of env vars
                              (setenv (string-append "CROSS_" env-name)
                                      (filter-delimited-string env-val mingw-path?))))
-                         '("CPLUS_INCLUDE_PATH" "LIBRARY_PATH" "C_INCLUDE_PATH"))))
+                         '("CPATH" "LIBRARY_PATH"))
+                        (setenv "CROSS_C_INCLUDE_PATH" (string-append (assoc-ref %build-inputs "libc") "/include"))
+                        (setenv "CROSS_CPLUS_INCLUDE_PATH" (string-append (assoc-ref %build-inputs "libc") "/include"))))
                     (add-before 'build 'fix-target-detection
                       (lambda _
                         ;; NSIS target detection is screwed up, manually