diff --git a/libbuild2-autoconf-tests/build/root.build b/libbuild2-autoconf-tests/build/root.build
index de62e39..6c0130f 100644
--- a/libbuild2-autoconf-tests/build/root.build
+++ b/libbuild2-autoconf-tests/build/root.build
@@ -3,7 +3,8 @@
 # Also, our tests use this project as their amalgamation in order to get the
 # module import location (as well as the C module configuration).
 #
-using autoconf
+if ($build.mode != 'skeleton')
+  using autoconf
 
 using c