From d737091da31ed676b4b474f92f1687b510769136 Mon Sep 17 00:00:00 2001
From: Mitchell Skaggs <skaggsm333@gmail.com>
Date: Sat, 7 Dec 2024 00:23:56 -0600
Subject: [PATCH] nixos/man-db: set `preferLocalBuild = true`

When we _must_ build, prefer building locally since we probably already have the manpages here. Otherwise, Nix would send all the manpages to a remote builder which isn't likely to be much faster since building the DB is single-threaded. Hopefully a best-of-both worlds between keeping or removing https://github.com/NixOS/nixpkgs/commit/39e63f110e2b8607e4142e1461d08fb20b36497e.
---
 nixos/modules/misc/man-db.nix | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nixos/modules/misc/man-db.nix b/nixos/modules/misc/man-db.nix
index dc6af4fe9692..50ae6d790789 100644
--- a/nixos/modules/misc/man-db.nix
+++ b/nixos/modules/misc/man-db.nix
@@ -82,6 +82,7 @@ in
           pkgs.runCommand "man-cache"
             {
               nativeBuildInputs = [ buildPackage ];
+              preferLocalBuild = true;
             }
             ''
               echo "MANDB_MAP ${cfg.manualPages}/share/man $out" > man.conf