diff --git a/pkgs/servers/web-apps/discourse/auto_generated_path.patch b/pkgs/servers/web-apps/discourse/auto_generated_path.patch
new file mode 100644
index 00000000000..9dcb1cb5595
--- /dev/null
+++ b/pkgs/servers/web-apps/discourse/auto_generated_path.patch
@@ -0,0 +1,13 @@
+diff --git a/lib/plugin/instance.rb b/lib/plugin/instance.rb
+index 380a63e987..b2ce7fa982 100644
+--- a/lib/plugin/instance.rb
++++ b/lib/plugin/instance.rb
+@@ -403,7 +403,7 @@ class Plugin::Instance
+   end
+ 
+   def auto_generated_path
+-    File.dirname(path) << "/auto_generated"
++    "#{Rails.root}/public/assets/auto_generated_plugin_assets/#{name}"
+   end
+ 
+   def after_initialize(&block)
diff --git a/pkgs/servers/web-apps/discourse/default.nix b/pkgs/servers/web-apps/discourse/default.nix
index abe12fe0d8c..41f0bf91503 100644
--- a/pkgs/servers/web-apps/discourse/default.nix
+++ b/pkgs/servers/web-apps/discourse/default.nix
@@ -157,6 +157,11 @@ let
       # Use the Ruby API version in the plugin gem path, to match the
       # one constructed by bundlerEnv
       ./plugin_gem_api_version.patch
+
+      # Change the path to the auto generated plugin assets, which
+      # defaults to the plugin's directory and isn't writable at the
+      # time of asset generation
+      ./auto_generated_path.patch
     ];
 
     # We have to set up an environment that is close enough to
@@ -243,6 +248,11 @@ let
       # Use mv instead of rename, since rename doesn't work across
       # device boundaries
       ./use_mv_instead_of_rename.patch
+
+      # Change the path to the auto generated plugin assets, which
+      # defaults to the plugin's directory and isn't writable at the
+      # time of asset generation
+      ./auto_generated_path.patch
     ];
 
     postPatch = ''