From f1cb7effb5ffa16cdcecc757a751ac628872dd35 Mon Sep 17 00:00:00 2001
From: Luke Bailey <baileylu@tcd.ie>
Date: Sun, 18 May 2025 00:24:39 +0100
Subject: [PATCH] buildMix: use . instead of glob pattern for copying source

buildMix currently uses $src/* when copying source files into $out.
However, this does not include important hidden files like
`.formatter.exs` which contains custom package formatters, for example.
---
 pkgs/development/beam-modules/build-mix.nix | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pkgs/development/beam-modules/build-mix.nix b/pkgs/development/beam-modules/build-mix.nix
index dd2d3f7dea97..243028f16365 100644
--- a/pkgs/development/beam-modules/build-mix.nix
+++ b/pkgs/development/beam-modules/build-mix.nix
@@ -124,7 +124,7 @@ let
             # phoenix applications need the source of phoenix and phoenix_html to
             # build javascript and css assets.
             mkdir -p $out/src
-            cp -r $src/* "$out/src"
+            cp -r "$src/." "$out/src"
 
             runHook postInstall
           '';