diff --git a/pkgs/development/beam-modules/rebar3-release.nix b/pkgs/development/beam-modules/rebar3-release.nix
index 11d1ebfd3ab4..e1af791cfa5a 100644
--- a/pkgs/development/beam-modules/rebar3-release.nix
+++ b/pkgs/development/beam-modules/rebar3-release.nix
@@ -74,7 +74,9 @@ let
 
         inherit src;
 
-        env.REBAR_IGNORE_DEPS = beamDeps != [ ];
+        env = (attrs.env or { }) // {
+          REBAR_IGNORE_DEPS = beamDeps != [ ];
+        };
 
         configurePhase = ''
           runHook preConfigure