From d03354ab859fe190bd1916553cf5af69d7619bb6 Mon Sep 17 00:00:00 2001
From: Rick van Schijndel <rol3517@gmail.com>
Date: Fri, 13 May 2022 07:19:28 +0200
Subject: [PATCH] UUID4-Tiny: add potential patch for aarch64

Hopefully ofborg can confirm or deny this works...
---
 pkgs/top-level/perl-packages.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/top-level/perl-packages.nix b/pkgs/top-level/perl-packages.nix
index 3c1557f52ca..44b3e189611 100644
--- a/pkgs/top-level/perl-packages.nix
+++ b/pkgs/top-level/perl-packages.nix
@@ -24497,6 +24497,12 @@ let
       url = "mirror://cpan/authors/id/C/CV/CVLIBRARY/UUID4-Tiny-0.002.tar.gz";
       sha256 = "e7535b31e386d432dec7adde214348389e1d5cf753e7ed07f1ae04c4360840cf";
     };
+    postPatch = lib.optionalString (stdenv.isAarch64) ''
+      # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/uapi/asm-generic/unistd.h
+      # printf SYS_getrandom | gcc -include sys/syscall.h -E -
+      substituteInPlace lib/UUID4/Tiny.pm \
+        --replace "syscall( 318" "syscall( 278"
+    '';
     meta = {
       description = "Cryptographically secure v4 UUIDs for Linux x64";
       license = with lib.licenses; [ artistic1 gpl1Plus ];