diff --git a/default.nix b/default.nix
index 46e8750..f312029 100644
--- a/default.nix
+++ b/default.nix
@@ -164,9 +164,6 @@ let
 
       patchPhase = ''
         ln -sf ${nodeSource}/node_modules .
-        rm -f webpack.config.js
-        rm -f wand.js
-        rm -f template.html
         cp ${webpackConfigFile} webpack.config.js
         cp ${wandInit} wand.js
         cp ${templateHtml} template.html
@@ -174,6 +171,9 @@ let
 
       shellHook = ''
         ln -sf ${nodeSource}/node_modules .
+        rm -f webpack.config.js
+        rm -f wand.js
+        rm -f template.html
         cp ${webpackConfigFile} webpack.config.js
         cp ${wandInit} wand.js
         cp ${templateHtml} template.html