diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..fcfc4a1
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+result*
diff --git a/dae/metadata.json b/dae/metadata.json
new file mode 100644
index 0000000..b715859
--- /dev/null
+++ b/dae/metadata.json
@@ -0,0 +1,6 @@
+{
+  "version": "v0.6.0rc1",
+  "rev": "v0.6.0rc1",
+  "hash": "sha256-A8ecYE0p+FoW0yskprvvy73pup/eR4bx8HNa55OorwY=",
+  "vendorHash": "sha256-NzPPf/KwuRCMmOGwk9k3ndYojDF9B/hXBPQ8ySan3t8="
+}
diff --git a/dae/package.nix b/dae/package.nix
index fa4a107..3654202 100644
--- a/dae/package.nix
+++ b/dae/package.nix
@@ -3,20 +3,20 @@
 , fetchFromGitHub
 , buildGoModule
 }:
+let
+  metadata = builtins.fromJSON (builtins.readFile ./metadata.json);
+in
 buildGoModule rec {
   pname = "dae";
-  version = "unstable-2023-09-04";
+  inherit (metadata) version vendorHash;
 
   src = fetchFromGitHub {
     owner = "daeuniverse";
     repo = pname;
-    rev = "8334868905096abc4a2e94d39f831f6bae8e86d3";
-    hash = "sha256-aOL0rwjRES0V3PFmBiHJcNiyOcGKGNY78Wqgnbk2cG0=";
+    inherit (metadata) rev hash;
     fetchSubmodules = true;
   };
 
-  vendorHash = "sha256-rZwK+mYWJqgLFhzwZTfCC4tIg2gtNtx7Lu/fyOL3ozA=";
-
   proxyVendor = true;
 
   nativeBuildInputs = [ clang ];
diff --git a/justfile b/justfile
new file mode 100644
index 0000000..160a966
--- /dev/null
+++ b/justfile
@@ -0,0 +1,39 @@
+# justfile
+# cheatsheet: https://cheatography.com/linux-china/cheat-sheets/justfile/
+
+# define alias
+
+# set options
+set positional-arguments := true
+
+# default recipe to display help information
+default:
+  @just --list
+
+# build pkg
+build pkg:
+  @nix build .#{{ pkg }}
+
+# check version
+version pkg:
+  @./result/bin/{{ pkg }} --version
+
+# update all flake inputs
+update:
+  @nix flake update
+
+# update a particular flake input
+update-input input:
+  @nix flake lock --update-input {{ input }}
+
+# nix-prefetch-url
+prefetch-url url:
+  @nix-prefetch-url --type sha256 '{{ url }}' | xargs nix hash to-sri --type sha256
+
+# nix-prefetch-git
+prefetch-git repo rev:
+  @nix-prefetch-git --url 'git@github.com:{{ repo }}' --rev '{{ rev }}' --fetch-submodules --quiet
+
+# stage all files
+add:
+  @git add .