diff --git a/pkgs/development/interpreters/lua-5/build-luarocks-package.nix b/pkgs/development/interpreters/lua-5/build-luarocks-package.nix
index 6f3342d057bd..55bd577e46d1 100644
--- a/pkgs/development/interpreters/lua-5/build-luarocks-package.nix
+++ b/pkgs/development/interpreters/lua-5/build-luarocks-package.nix
@@ -132,6 +132,8 @@ let
 
     generatedConfig = luaLib.generateLuarocksConfig {
       externalDeps = lib.unique (self.externalDeps ++ externalDepsGenerated);
+      local_cache = "";
+
       # Filter out the lua derivation itself from the Lua module dependency
       # closure, as it doesn't have a rock tree :)
       # luaLib.hasLuaModule
diff --git a/pkgs/development/lua-modules/lib.nix b/pkgs/development/lua-modules/lib.nix
index 5841547073d3..dc7cbcc5f76e 100644
--- a/pkgs/development/lua-modules/lib.nix
+++ b/pkgs/development/lua-modules/lib.nix
@@ -124,7 +124,6 @@ rec {
         (lib.filter (lib.isDerivation) externalDeps);
 
       generatedConfig = ({
-        local_cache = "";
 
         # To prevent collisions when creating environments, we install the rock
         # files into per-package subdirectories