arc_unpacker: fix build

pkgs/tools/archivers/arc_unpacker/add-missing-import.patch

@@ -0,0 +1,22 @@
+From 29c0b393283395c69ecdd747e960301e95c93bcf Mon Sep 17 00:00:00 2001
+From: Felix Rath <felixm.rath@gmail.com>
+Date: Sat, 15 May 2021 13:07:38 +0200
+Subject: [PATCH] add missing <stdexcept> import
+
+`std::logic_error` is used in this file, which resides in `<stdexcept>`, but was not imported before. This caused the build to fail, see, e.g., https://hydra.nixos.org/build/141997371/log.
+---
+ src/algo/crypt/lcg.cc | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/src/algo/crypt/lcg.cc b/src/algo/crypt/lcg.cc
+index 6c2a7945..66630a08 100644
+--- a/src/algo/crypt/lcg.cc
++++ b/src/algo/crypt/lcg.cc
+@@ -17,6 +17,7 @@
+ 
+ #include "algo/crypt/lcg.h"
+ #include <functional>
++#include <stdexcept>
+ 
+ using namespace au;
+ using namespace au::algo::crypt;

pkgs/tools/archivers/arc_unpacker/default.nix

@@ -18,6 +18,13 @@ stdenv.mkDerivation rec {
   nativeBuildInputs = [ cmake makeWrapper catch ];
   buildInputs = [ boost libpng libjpeg zlib openssl libwebp ];
 
+  patches = [
+    # Add a missing `<stdexcept>` import that caused the build to fail.
+    # Failure: https://hydra.nixos.org/build/141997371/log
+    # Also submitted as an upstream PR: https://github.com/vn-tools/arc_unpacker/pull/194
+    ./add-missing-import.patch
+  ];
+
   postPatch = ''
     cp ${catch}/include/catch/catch.hpp tests/test_support/catch.h
   '';