diff --git a/flake.nix b/flake.nix
index 9855651..f96ec4a 100644
--- a/flake.nix
+++ b/flake.nix
@@ -25,13 +25,7 @@
       # `nix build`
       packages.heliwatch = naersk-lib.buildPackage {
         pname = "heliwatch";
-        root = builtins.filterSource (path: type:
-          builtins.elem (baseNameOf path) [
-            "src"
-            "Cargo.toml"
-            "Cargo.lock"
-          ] || baseNameOf (dirOf path) == "src"
-        ) ./.;
+        root = ./.;
         nativeBuildInputs = with pkgs; [ pkg-config ];
         buildInputs = with pkgs; [ openssl ];
       };