From 63eaff4dc1dfbfbd4665c86190e17f928ab20d79 Mon Sep 17 00:00:00 2001
From: Robert Scott <code@humanleg.org.uk>
Date: Fri, 12 Nov 2021 00:02:36 +0000
Subject: [PATCH] xscreensaver: fix build for aarch64

---
 pkgs/misc/screensavers/xscreensaver/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/misc/screensavers/xscreensaver/default.nix b/pkgs/misc/screensavers/xscreensaver/default.nix
index 81f37b0bc41a..b90f75f6a042 100644
--- a/pkgs/misc/screensavers/xscreensaver/default.nix
+++ b/pkgs/misc/screensavers/xscreensaver/default.nix
@@ -37,6 +37,9 @@ stdenv.mkDerivation rec {
     "--with-app-defaults=${placeholder "out"}/share/xscreensaver/app-defaults"
   ];
 
+  # "marbling" has NEON code that mixes signed and unsigned vector types
+  NIX_CFLAGS_COMPILE = lib.optional (with stdenv.hostPlatform; isAarch64 || isAarch32) "-flax-vector-conversions";
+
   postInstall = ''
     for bin in $out/bin/*; do
       wrapProgram "$bin" \