diff --git a/ethercat.nix b/ethercat.nix
index 0df96e7..0457098 100644
--- a/ethercat.nix
+++ b/ethercat.nix
@@ -57,6 +57,7 @@ stdenv.mkDerivation {
     "--disable-8139too"
     "--enable-tool"
     "--enable-userlib"
+    "--enable-tty"
     "--with-linux-dir=${kernel.dev}/lib/modules/${kernel.modDirVersion}/build"
   ];
   #++ lib.optionals (!guiSupport) [ "--disable-gui" "--enable-systemd" ] # TODO add flags for nongeneric NICs like this