From ff7406c2894795eac919a990e3faf3355a8f46b8 Mon Sep 17 00:00:00 2001
From: Sergei Trofimovich <slyich@gmail.com>
Date: Wed, 27 Oct 2021 22:49:04 +0100
Subject: [PATCH] judy: disable parallel build

Parallel build fails for missing manpage dependencies:
  https://sourceforge.net/p/judy/patches/4/
Upstream patch is not very portable. Let's explicitly disable
parallelism.
---
 pkgs/development/libraries/judy/default.nix | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/pkgs/development/libraries/judy/default.nix b/pkgs/development/libraries/judy/default.nix
index 077c4fe90fdb..bec72ac80206 100644
--- a/pkgs/development/libraries/judy/default.nix
+++ b/pkgs/development/libraries/judy/default.nix
@@ -15,6 +15,12 @@ stdenv.mkDerivation rec {
     configureFlagsArray+=("CFLAGS=-fno-strict-aliasing -fno-aggressive-loop-optimizations")
   '';
 
+  # Disable parallel builds as manpages lack some dependencies:
+  #    ../tool/jhton ext/JudyHS_funcs_3.htm | grep -v '^[   ]*$' | sed -e 's/\.C//' > man/man3/JudyHS_funcs
+  #    make[2]: *** No rule to make target 'man/man3/JSLD', needed by 'all-am'.  Stop.
+  # Let's wait for the upstream fix similar to https://sourceforge.net/p/judy/patches/4/
+  enableParallelBuilding = false;
+
   meta = {
     homepage = "http://judy.sourceforge.net/";
     license = lib.licenses.lgpl21Plus;