diff --git a/flake.nix b/flake.nix
index 1e27bf6..926e1c1 100644
--- a/flake.nix
+++ b/flake.nix
@@ -32,7 +32,12 @@
       {
         packages = {
           nixprstatus = mkPoetryApplication {
-            projectDir = ./.;
+            projectDir = pkgs.lib.sourceFilesBySuffices ./. [
+              "pyproject.toml"
+              "poetry.lock"
+              "README.md"
+              ".py"
+            ];
             python = pkgs.python312;
             nativeBuildInputs = [ pkgs.installShellFiles ];
             postInstall = ''