diff --git a/doc/manual/src/design/overview.md b/doc/manual/src/design/overview.md
index b1adb143b..0cead62ab 100644
--- a/doc/manual/src/design/overview.md
+++ b/doc/manual/src/design/overview.md
@@ -17,7 +17,6 @@ The command line and Nix language are what users interact with most.
 
 Underlying everything is the *Nix store*, a mechanism to keep track of build plans, data, and references between them.
 It can also execute *build instructions*, captured in the build plans, to produce new data.
-It uses the file system as a persistence layer, and a database to keep track of references.
 
 This chapter describes Nix starting at the bottom with the store layer, then working its way up to the user-facing components described in the rest of the manual.