diff --git a/pkgs/tools/backup/chunksync/default.nix b/pkgs/tools/backup/chunksync/default.nix
index 2ef4aa4ff1f..e51d6d6acea 100644
--- a/pkgs/tools/backup/chunksync/default.nix
+++ b/pkgs/tools/backup/chunksync/default.nix
@@ -11,6 +11,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [openssl perl];
 
+  NIX_LDFLAGS = "-lgcc_s";
+
   makeFlags = [
     "DESTDIR=$(out)"
     "PREFIX="