diff --git a/default.nix b/default.nix
index fe2eecd..e44d133 100644
--- a/default.nix
+++ b/default.nix
@@ -18,6 +18,7 @@ let
 in
 rustPlatform.buildRustPackage {
   name = "tls-server";
+  src = nix-gitignore.gitignoreSource [ ] ./.;
 
   cargoLock = {
     lockFile = ./Cargo.lock;