From c6eba2cd00d04ba3a3c34052c3cce4f9182876af Mon Sep 17 00:00:00 2001
From: Dmitry Kalinkin <dmitry.kalinkin@gmail.com>
Date: Fri, 7 May 2021 23:14:48 -0400
Subject: [PATCH] texlive.bin.core-big: fix parallel build

---
 pkgs/tools/typesetting/tex/texlive/bin.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/tools/typesetting/tex/texlive/bin.nix b/pkgs/tools/typesetting/tex/texlive/bin.nix
index f52cf3a29a4e..32fba9a8e1f3 100644
--- a/pkgs/tools/typesetting/tex/texlive/bin.nix
+++ b/pkgs/tools/typesetting/tex/texlive/bin.nix
@@ -185,6 +185,12 @@ core-big = stdenv.mkDerivation { #TODO: upmendex
 
         mkdir -p "$path" && cd "$path"
         "../../../$path/configure" $configureFlags $extraConfig
+
+        if [[ "$path" =~ "libs/pplib" ]]; then
+          # TODO: revert for texlive 2022
+          # ../../../texk/web2c/luatexdir/luamd5/md5lib.c:197:10: fatal error: 'utilsha.h' file not found
+          make ''${enableParallelBuilding:+-j''${NIX_BUILD_CORES} -l''${NIX_BUILD_CORES}}
+        fi
       )
     done
   '';