diff --git a/flake.nix b/flake.nix
index b1e5ad3..407d679 100644
--- a/flake.nix
+++ b/flake.nix
@@ -50,6 +50,7 @@
     gifFilter   = path: type: builtins.match ".*gif$" path != null;
     jsFilter    = path: type: builtins.match ".*js$" path != null;
     mdFilter    = path: type: builtins.match ".*md$" path != null;
+    txtFilter   = path: type: builtins.match ".*txt$" path != null;
     woff2Filter = path: type: builtins.match ".*woff2$" path != null;
 
      src = lib.cleanSourceWith {
@@ -59,6 +60,7 @@
         || (gifFilter   path type)
         || (jsFilter    path type)
         || (mdFilter    path type)
+        || (txtFilter    path type)
         || (woff2Filter path type);
     };