diff --git a/pkgs/os-specific/linux/restool/default.nix b/pkgs/os-specific/linux/restool/default.nix
index 4f488c28323..83c7c93ffcd 100644
--- a/pkgs/os-specific/linux/restool/default.nix
+++ b/pkgs/os-specific/linux/restool/default.nix
@@ -18,6 +18,12 @@ stdenv.mkDerivation rec {
     "VERSION=${version}"
   ];
 
+  postPatch = ''
+    # -Werror makes this derivation fragile on compiler version upgrades, patch
+    # it out.
+    sed -i /-Werror/d Makefile
+  '';
+
   preFixup = ''
     # wrapProgram interacts badly with the ls-main tool, which relies on the
     # shell's $0 argument to figure out which operation to run (busybox-style