Use zsh-histdb package.

nix/configuration/flake.nix

@@ -38,6 +38,12 @@
     lanzaboote = {
       url = "github:nix-community/lanzaboote/v0.4.1";
 
+      # Optional but recommended to limit the size of your system closure.
+      inputs.nixpkgs.follows = "nixpkgs";
+    };
+    zsh-histdb = {
+      url = "path:flakes/zsh-histdb";
+
       # Optional but recommended to limit the size of your system closure.
       inputs.nixpkgs.follows = "nixpkgs";
     };
@@ -52,6 +58,7 @@
       impermanence,
       home-manager,
       lanzaboote,
+      zsh-histdb,
       ...
     }@inputs:
     let
@@ -73,6 +80,7 @@
             home-manager.useGlobalPkgs = true;
             home-manager.useUserPackages = true;
           }
+          { nixpkgs.overlays = [ zsh-histdb.overlays.default ]; }
           ./configuration.nix
         ];
       };