diff --git a/fix-up/do.sh b/fix-up/do.sh
index e330ebb..6ac8946 100755
--- a/fix-up/do.sh
+++ b/fix-up/do.sh
@@ -39,6 +39,7 @@ done <<< "$(find "$1/$2" -name "*project.pascal.name*" ! -wholename "$1/$2/.proj
 [[ -f "$1/$2/develop" ]] && chmod +x "$1/$2/develop"
 [[ -f "$1/$2/build" ]] && chmod +x "$1/$2/build"
 [[ -f "$1/$2/deploy" ]] && chmod +x "$1/$2/deploy"
+[[ -f "$1/$2/arion" ]] && chmod +x "$1/$2/arion"
 find "$1/$2" -name "*.sh" -exec chmod +x {} \;
 find "$1/$2" -name "*.bash" -exec chmod +x {} \;
 find "$1/$2" -type d -name bin -exec chmod -R +x {} \;
diff --git a/nixify.sh b/nixify.sh
index 562817c..718a07f 100755
--- a/nixify.sh
+++ b/nixify.sh
@@ -85,6 +85,8 @@ case $3 in
          cp "${quick_cook_nixify_tmp_dir}/$2/build" "$1/$2"
          [ -f "$1/$2/deploy" ] && mv "$1/$2/deploy" "$1/$2/deploy.bak.by.nixify.$(date +%Y%m%d%H%M%S)"
          cp "${quick_cook_nixify_tmp_dir}/$2/deploy" "$1/$2"
+         [ -f "$1/$2/arion" ] && mv "$1/$2/arion" "$1/$2/arion.bak.by.nixify.$(date +%Y%m%d%H%M%S)"
+         cp "${quick_cook_nixify_tmp_dir}/$2/arion" "$1/$2"
 	 # for executables, we need to copy to override them after applying tempalte(Why?)
 	 cp "${SCRIPT_ABS_PATH}"/deployment-framework/arion "$1/$2/cd/" && chmod +x "$1/$2/cd/arion"
          mkdir -p "$1/$2/.github/workflows"
diff --git a/project-scaffold-template/nixos2111-ghc8107-haskell.nix/arion b/project-scaffold-template/nixos2111-ghc8107-haskell.nix/arion
new file mode 100755
index 0000000..4921443
--- /dev/null
+++ b/project-scaffold-template/nixos2111-ghc8107-haskell.nix/arion
@@ -0,0 +1 @@
+{{name|toSnake}}_datadir=$(dirname "$0")/cd $(dirname "$0")/cd/arion "$@"
diff --git a/project-scaffold-template/nixos2111-ghc8107-haskell.nix/nix/overlay/default.nix b/project-scaffold-template/nixos2111-ghc8107-haskell.nix/nix/overlay/default.nix
index ab57fa6..48db4de 100644
--- a/project-scaffold-template/nixos2111-ghc8107-haskell.nix/nix/overlay/default.nix
+++ b/project-scaffold-template/nixos2111-ghc8107-haskell.nix/nix/overlay/default.nix
@@ -1,2 +1,4 @@
-self: prev: 
-with prev.lib; mapAttrs' (attr: _: { name = removeSuffix ".nix" attr; value = ./.  + "/${attr}"; }) (filterAttrs (attr: _: attr != "default.nix" ) (builtins.readDir ./.)) 
+self: prev: {
+  # sample pakage override
+  # xxxx = prev.xxxx.overrideAttrs (oldAttr: rec { buildInputs = prev.xxxx.buildInputs ++ [ self.openssl ]; });
+}