From eb1813c6fad4fd6265f8f0aad41c950e3c8a3cfd Mon Sep 17 00:00:00 2001
From: Linus Heckemann <git@sphalerite.org>
Date: Wed, 22 Feb 2023 11:53:51 +0100
Subject: [PATCH] mkShell: set preferLocalBuild by default

Before this change, `nix develop` would often result in all the
shell's dependencies being copied to a remote builder, only for the
remote builder to run a trivial derivation build. This change makes
`nix develop` much faster on systems with remote builders configured.

(cherry picked from commit c4b83df38ab4fd47ed5549bfa0b29a4b70e94f38)
---
 pkgs/build-support/mkshell/default.nix | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/pkgs/build-support/mkshell/default.nix b/pkgs/build-support/mkshell/default.nix
index e7552f434848..60a061e6c542 100644
--- a/pkgs/build-support/mkshell/default.nix
+++ b/pkgs/build-support/mkshell/default.nix
@@ -52,4 +52,6 @@ stdenv.mkDerivation ({
     # Record all build inputs as runtime dependencies
     export >> $out
   '';
+
+  preferLocalBuild = true;
 } // rest)