diff --git a/installer/templates/phx_single/mix.exs b/installer/templates/phx_single/mix.exs
index ae64b2bdc2..d8aeed2498 100644
--- a/installer/templates/phx_single/mix.exs
+++ b/installer/templates/phx_single/mix.exs
@@ -78,7 +78,9 @@ defmodule <%= @app_module %>.MixProject do
       test: ["ecto.create --quiet", "ecto.migrate --quiet", "test"]<% end %><%= if @asset_builders != [] do %>,
       "assets.setup": <%= inspect Enum.map(@asset_builders, &"#{&1}.install --if-missing") %>,
       "assets.build": <%= inspect Enum.map(@asset_builders, &"#{&1} #{@app_name}") %>,
-      "assets.deploy": <%= inspect Enum.map(@asset_builders, &"#{&1} #{@app_name} --minify") ++ ["phx.digest"] %><% end %>
+      "assets.deploy": [
+<%= Enum.map(@asset_builders, &"        \"#{&1} #{@app_name} --minify\",\n") ++ ["        \"phx.digest\""] %>
+      ]<% end %>
     ]
   end
 end
diff --git a/installer/templates/phx_umbrella/apps/app_name_web/mix.exs b/installer/templates/phx_umbrella/apps/app_name_web/mix.exs
index 7e418c324c..780ea7a715 100644
--- a/installer/templates/phx_umbrella/apps/app_name_web/mix.exs
+++ b/installer/templates/phx_umbrella/apps/app_name_web/mix.exs
@@ -69,7 +69,9 @@ defmodule <%= @web_namespace %>.MixProject do
       test: ["ecto.create --quiet", "ecto.migrate --quiet", "test"]<% end %><%= if @asset_builders != [] do %>,
       "assets.setup": <%= inspect Enum.map(@asset_builders, &"#{&1}.install --if-missing") %>,
       "assets.build": <%= inspect Enum.map(@asset_builders, &"#{&1} #{@web_app_name}") %>,
-      "assets.deploy": <%= inspect Enum.map(@asset_builders, &"#{&1} #{@web_app_name} --minify") ++ ["phx.digest"] %><% end %>
+      "assets.deploy": [
+<%= Enum.map(@asset_builders, &"        \"#{&1} #{@web_app_name} --minify\",\n") ++ ["        \"phx.digest\""] %>
+      ]<% end %>
     ]
   end
 end