diff --git a/flake.nix b/flake.nix
index faa6325e..27da9583 100644
--- a/flake.nix
+++ b/flake.nix
@@ -51,6 +51,7 @@
               name: type:
                 !(pkgs.lib.strings.hasSuffix ".nix" name)
                 || builtins.match ".*proto$" name != null
+                || builtins.match ".*txt$" name != null
                 || craneLib.filterCargoSources name type
             ) [./.gitignore]
             ./.;