diff --git a/shell.nix b/shell.nix
index ee104d5..70c33f7 100644
--- a/shell.nix
+++ b/shell.nix
@@ -37,6 +37,7 @@ in
 pkgs.mkShell {
   nativeBuildInputs = [
     pkgs.colmena
+    pkgs.rbw
     agenix
     bootstrap
     pkgs.statix