From abdce1913ca10f85f5dcf0ecc7660c47b60b965c Mon Sep 17 00:00:00 2001
From: Mathieu Boespflug <m@tweag.io>
Date: Sun, 12 Apr 2020 15:06:23 +0200
Subject: [PATCH] Report progress before calling nix-build

---
 nixpkgs/nixpkgs.bzl | 1 +
 1 file changed, 1 insertion(+)

diff --git a/nixpkgs/nixpkgs.bzl b/nixpkgs/nixpkgs.bzl
index 2c3d004fe..6e0590d23 100644
--- a/nixpkgs/nixpkgs.bzl
+++ b/nixpkgs/nixpkgs.bzl
@@ -155,6 +155,7 @@ def _nixpkgs_package_impl(repository_ctx):
         # as we can do. The value shouldn't be too large to avoid errors on
         # macOS, see https://github.com/tweag/rules_nixpkgs/issues/92.
         timeout = 8640000
+        repository_ctx.report_progress("Building Nix derivation")
         exec_result = _execute_or_fail(
             repository_ctx,
             nix_build,