From a17e1b8809b5e02e5109209a8a2fc886891d5f7b Mon Sep 17 00:00:00 2001
From: Artturin <Artturin@artturin.com>
Date: Wed, 11 May 2022 16:41:30 +0300
Subject: [PATCH] config.enableParallelBuildingByDefault: init option

useful for testing if some builds could be faster
---
 pkgs/stdenv/generic/make-derivation.nix | 4 +++-
 pkgs/top-level/config.nix               | 4 ++++
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/pkgs/stdenv/generic/make-derivation.nix b/pkgs/stdenv/generic/make-derivation.nix
index 88450328ca7..64415c62efd 100644
--- a/pkgs/stdenv/generic/make-derivation.nix
+++ b/pkgs/stdenv/generic/make-derivation.nix
@@ -135,6 +135,8 @@ makeOverlayable (overrideAttrs:
 , # TODO(@Ericson2314): Make always true and remove
   strictDeps ? if config.strictDepsByDefault then true else stdenv.hostPlatform != stdenv.buildPlatform
 
+, enableParallelBuilding ? config.enableParallelBuildingByDefault
+
 , meta ? {}
 , passthru ? {}
 , pos ? # position used in error messages and for meta.position
@@ -377,7 +379,7 @@ else let
           llvm-config = 'llvm-config-native'
         '';
       in [ "--cross-file=${crossFile}" ] ++ mesonFlags;
-    } // lib.optionalAttrs (attrs.enableParallelBuilding or false) {
+    } // lib.optionalAttrs (enableParallelBuilding) {
       enableParallelChecking = attrs.enableParallelChecking or true;
     } // lib.optionalAttrs (hardeningDisable != [] || hardeningEnable != [] || stdenv.hostPlatform.isMusl) {
       NIX_HARDENING_ENABLE = enabledHardeningOptions;
diff --git a/pkgs/top-level/config.nix b/pkgs/top-level/config.nix
index d553b624039..8c15e63e5fb 100644
--- a/pkgs/top-level/config.nix
+++ b/pkgs/top-level/config.nix
@@ -36,6 +36,10 @@ let
       feature = "set <literal>strictDeps</literal> to true by default";
     };
 
+    enableParallelBuildingByDefault = mkMassRebuild {
+      feature = "set <literal>enableParallelBuilding</literal> to true by default";
+    };
+
     contentAddressedByDefault = mkMassRebuild {
       feature = "set <literal>__contentAddressed</literal> to true by default";
     };