diff --git a/doc/indexdbSchema.txt b/doc/indexdbSchema.txt
index 25b712e..4bdc79c 100644
--- a/doc/indexdbSchema.txt
+++ b/doc/indexdbSchema.txt
@@ -44,4 +44,12 @@ CREATE TABLE IF NOT EXISTS packages (
 
     UNIQUE(query_name, version),
     UNIQUE(query_name, serial)
+);
+
+
+
+CREATE TABLE IF NOT EXISTS build_dependencies (
+    id TEXT PRIMARY KEY,
+    dir TEXT NOT NULL DEFAULT "/dev/null"
+    uses INTEGER NOT NULL DEFAULT 0
 );
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