From 81b0a20dfaa4a91b4951f037a6b577f90d8339f0 Mon Sep 17 00:00:00 2001
From: tomberek <tomberek@users.noreply.github.com>
Date: Sat, 7 Dec 2019 04:06:42 -0500
Subject: [PATCH] buildImageWithNixDb: export USER (#74959)

dockerTools.buildImageWithNixDb: export USER

Changes to Nix user detection (./src/nix-channel/nix-channel.cc#L-166)
cause this function to error. Exporting USER fixes this.
---
 pkgs/build-support/docker/default.nix | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/pkgs/build-support/docker/default.nix b/pkgs/build-support/docker/default.nix
index 37b25232b961..2a25ac04d40f 100644
--- a/pkgs/build-support/docker/default.nix
+++ b/pkgs/build-support/docker/default.nix
@@ -845,6 +845,9 @@ rec {
         echo "         be better to only have one layer that contains a nix store."
 
         export NIX_REMOTE=local?root=$PWD
+        # A user is required by nix
+        # https://github.com/NixOS/nix/blob/9348f9291e5d9e4ba3c4347ea1b235640f54fd79/src/libutil/util.cc#L478
+        export USER=nobody
         ${nix}/bin/nix-store --load-db < ${closureInfo {rootPaths = contentsList;}}/registration
 
         mkdir -p nix/var/nix/gcroots/docker/