From da4813072f3cab88cff1ee71be9f877c3ed774a8 Mon Sep 17 00:00:00 2001
From: Milan Svoboda <milan.svoboda@centrum.cz>
Date: Sat, 29 Sep 2018 23:10:23 +0200
Subject: [PATCH] boost: fix fiber header (#47540)
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include/boost/fiber/detail/context_spmc_queue.hpp:1:1: error: stray ‘\357’ in program
caused by a leftover UTF-8 Byte Order Mark
---
 pkgs/development/libraries/boost/generic.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/libraries/boost/generic.nix b/pkgs/development/libraries/boost/generic.nix
index 4131e5f7a27..1ab0718e796 100644
--- a/pkgs/development/libraries/boost/generic.nix
+++ b/pkgs/development/libraries/boost/generic.nix
@@ -171,7 +171,7 @@ stdenv.mkDerivation {
   postFixup = ''
     # Make boost header paths relative so that they are not runtime dependencies
     cd "$dev" && find include \( -name '*.hpp' -or -name '*.h' -or -name '*.ipp' \) \
-      -exec sed '1i#line 1 "{}"' -i '{}' \;
+      -exec sed '1s/^\xef\xbb\xbf//;1i#line 1 "{}"' -i '{}' \;
   '' + optionalString (stdenv.hostPlatform.libc == "msvcrt") ''
     $RANLIB "$out/lib/"*.a
   '';