diff --git a/default.nix b/default.nix
index faa823b..ed79724 100644
--- a/default.nix
+++ b/default.nix
@@ -171,6 +171,7 @@ let
 
       shellHook = ''
         ln -sf ${nodeSource}/node_modules .
+        ln -sf ${webpackConfigFile} webpack.config.js
       '';
 
       buildPhase = elmPackages.fetchElmDeps {