diff --git a/Makefile.am b/Makefile.am
index f39a2d8..d1a08f2 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,6 +1,6 @@
 AUTOMAKE_OPTIONS = gnu
-SUBDIRS = tools include src plugingui plugin drumgizmo man test
-DISTDIRS = tools include src plugingui plugin drumgizmo man test
+SUBDIRS = tools include src plugin drumgizmo man
+DISTDIRS = tools include src plugin drumgizmo man
 
 EXTRA_DIST = \
 	version.h \
diff --git a/configure.ac b/configure.ac
index 6b4593c..591d800 100644
--- a/configure.ac
+++ b/configure.ac
@@ -188,7 +188,7 @@ AS_IF(
   GUI_CPPFLAGS="-DUI_PUGL -DPUGL_HAVE_GL"
   GUI_LIBS="-framework OpenGL -framework Cocoa"],
 
-  AC_MSG_ERROR([*** No GUI backend has been selected ***])
+  AC_MSG_WARN([*** No GUI backend has been selected ***])
 )
 
 AC_SUBST(GUI_CPPFLAGS)