progs: Build rebook with scons too.
diff --git a/progs/SConscript b/progs/SConscript
index 631923a..68a48b4 100644
--- a/progs/SConscript
+++ b/progs/SConscript
@@ -2,5 +2,6 @@
     'util/SConscript',
     'demos/SConscript',
     'trivial/SConscript',
+    'redbook/SConscript',
     'vp/SConscript',
 ])