From 922a9d65f440d91557501992745759cf34278109 Mon Sep 17 00:00:00 2001
From: "Adam C. Stephens" <adam@valkor.net>
Date: Thu, 26 Mar 2026 23:36:26 -0400
Subject: [PATCH] beamPackages.buildMix,buildRebar3: merge args.env with
 builder env

---
 pkgs/development/beam-modules/build-mix.nix    | 3 ++-
 pkgs/development/beam-modules/build-rebar3.nix | 3 ++-
 2 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/pkgs/development/beam-modules/build-mix.nix b/pkgs/development/beam-modules/build-mix.nix
index 52c0ce1ad1f8e..1994f89f3ef12 100644
--- a/pkgs/development/beam-modules/build-mix.nix
+++ b/pkgs/development/beam-modules/build-mix.nix
@@ -57,7 +57,8 @@ lib.extendMkDerivation {
 
         # some hooks need name-version, but we've overridden name above for the nix package
         beamModuleName = args.name;
-      };
+      }
+      // (args.env or { });
 
       __darwinAllowLocalNetworking = true;
 
diff --git a/pkgs/development/beam-modules/build-rebar3.nix b/pkgs/development/beam-modules/build-rebar3.nix
index 11b1c8b44e528..1145905996bc0 100644
--- a/pkgs/development/beam-modules/build-rebar3.nix
+++ b/pkgs/development/beam-modules/build-rebar3.nix
@@ -67,7 +67,8 @@ lib.extendMkDerivation {
           "[${lib.concatStringsSep "," options}]";
 
         beamModuleName = args.name;
-      };
+      }
+      // (args.env or { });
 
       setupHook = writeText "setupHook.sh" ''
         addToSearchPath ERL_LIBS "$1/lib/erlang/lib/"