diff --git a/flake.nix b/flake.nix
index 00eb48b..289ea20 100644
--- a/flake.nix
+++ b/flake.nix
@@ -61,7 +61,8 @@
           # scgi_params, uwsgi_params, koi-utf, koi-win, etc.) — chart configs
           # `include fastcgi_params;` and similar resolve relative to /etc/angie.
           cp ${angie}/conf/* etc/angie/
-          cp ${mainConf} etc/angie/angie.conf
+          chmod -R u+w etc/angie
+          cp -f ${mainConf} etc/angie/angie.conf
         '';
         config = {
           Entrypoint = [ "${angie}/bin/angie" ];