diff --git a/overlay/default.nix b/overlay/default.nix
index 9e8877e..128f3a8 100644
--- a/overlay/default.nix
+++ b/overlay/default.nix
@@ -18,6 +18,7 @@ in {
   bash = overrideTargetAttrs bash (attrs: {
     configureFlags = attrs.configureFlags
       ++ [ "--without-bash-malloc" ]; # no sbrk please
+    postPatch = "sed '/check_dev_tty/d' shell.c";
   });
 
   binutils-unwrapped = overrideTargetAttrs binutils-unwrapped (attrs: {