diff --git a/flake.nix b/flake.nix
index ef1ea2f..59ff01a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -130,6 +130,7 @@
       GCROOT = mkRoots syspkgs [
         syspkgs.stdenv KERNEL OPENSBI syspkgs.riscv-tools
       ];
+      nativeBuildInputs = with syspkgs; [ rsync ];
       shellHook = ''
         echo "Here are the current system pieces:"
         echo " COMMIT    = $COMMIT"