From ecce246e13aa2dea5c80122347031cdcb030189e Mon Sep 17 00:00:00 2001
From: Markus Kowalewski <markus.kowalewski@gmail.com>
Date: Sat, 30 Sep 2023 15:04:37 +0200
Subject: [PATCH] elpa: split outputs and enable parallel builds

---
 pkgs/development/libraries/elpa/default.nix | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/pkgs/development/libraries/elpa/default.nix b/pkgs/development/libraries/elpa/default.nix
index 003de885c791..810e04d3a377 100644
--- a/pkgs/development/libraries/elpa/default.nix
+++ b/pkgs/development/libraries/elpa/default.nix
@@ -41,6 +41,8 @@ stdenv.mkDerivation rec {
     substituteInPlace Makefile.am --replace '#!/bin/bash' '#!${stdenv.shell}'
   '';
 
+  outputs = [ "out" "doc" "man" "dev" ];
+
   nativeBuildInputs = [ autoreconfHook perl ];
 
   buildInputs = [ mpi blas lapack scalapack ]
@@ -74,6 +76,8 @@ stdenv.mkDerivation rec {
     ++ lib.optional stdenv.hostPlatform.isx86_64 "--enable-sse-assembly"
     ++ lib.optionals enableCuda [  "--enable-nvidia-gpu" "--with-NVIDIA-GPU-compute-capability=${nvidiaArch}" ];
 
+  enableParallelBuilding = true;
+
   doCheck = true;
 
   nativeCheckInputs = [ mpiCheckPhaseHook openssh ];