diff --git a/package.nix b/package.nix
index 81e5befc..61a91b38 100644
--- a/package.nix
+++ b/package.nix
@@ -34,6 +34,8 @@ rustPlatform.buildRustPackage rec {
   cargoTestFlags = [ "--lib" ];
 
   postPatch = ''
+    ls -al
+    grep -Ril "lgcc_eh" .
     substituteInPlace configure.ac --replace "-lgcc_s" "-lgcc_eh"
   '';