diff --git a/flake.nix b/flake.nix
index a0d008a..c3bd57d 100644
--- a/flake.nix
+++ b/flake.nix
@@ -44,7 +44,11 @@
           strictDeps = true;
           __structuredAttrs = true;
 
-          src = ./.;
+          src = lib.sourceFilesBySuffices ./. [
+            "Cargo.toml"
+            "Cargo.lock"
+            ".rs"
+          ];
         };
 
         crate =
@@ -59,7 +63,7 @@
             commonArgs
             // {
               inherit name;
-              cargoLock.lockFile = ./Cargo.lock;
+              cargoLock.lockFile = "${commonArgs.src}/Cargo.lock";
 
               nativeBuildInputs = commonArgs.nativeBuildInputs ++ [
                 pkgs.autoPatchelfHook