diff --git a/Makefile.am b/Makefile.am
index 51884b9221..05ce9aa7b4 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -51,6 +51,7 @@ MODULES =					\
   guix/build-system/cmake.scm			\
   guix/build-system/glib-or-gtk.scm		\
   guix/build-system/gnu.scm			\
+  guix/build-system/haskell.scm			\
   guix/build-system/perl.scm			\
   guix/build-system/python.scm			\
   guix/build-system/waf.scm			\