diff --git a/gnu/packages/games.scm b/gnu/packages/games.scm
index 9118158e0c..4274d4ce38 100644
--- a/gnu/packages/games.scm
+++ b/gnu/packages/games.scm
@@ -1253,6 +1253,7 @@ world}, @uref{http://evolonline.org, Evol Online} and
                       (list "all" (string-append "PREFIX=" out)))
        ;; There are no tests.
        #:tests? #f))
+    ;; As per the Makefile (in projects/unix/Makefile):
     (supported-systems '("i686-linux" "x86_64-linux"))
     (home-page "http://www.mupen64plus.org/")
     (synopsis "Nintendo 64 emulator core library")