diff --git a/build/digest/3.1.1 b/build/digest/3.1.1
new file mode 100644
index 00000000..e69de29b
diff --git a/build/json/2.6.3 b/build/json/2.6.3
new file mode 100644
index 00000000..e69de29b
diff --git a/build/racc/1.6.1 b/build/racc/1.6.1
new file mode 100644
index 00000000..e69de29b