diff --git a/justfile b/justfile
new file mode 100644
index 0000000..860f485
--- /dev/null
+++ b/justfile
@@ -0,0 +1,24 @@
+[parallel]
+test: stackage-server-nix
+    stack test
+    nix flake check
+
+stackage-server-nix:
+    cd nix && ./gen-packages.sh stackage-server
+
+cachix-push:
+    # inputs
+    nix flake archive --json \
+        | jq -r '.path,(.inputs|to_entries[].value.path)' \
+        | cachix push stackage-infrastructure
+
+    # runtime closure
+    nix build --no-link --print-out-paths \
+        | cachix push stackage-infrastructure
+
+    # shell env
+    nix develop --profile dev-profile -c true
+    cachix push stackage-infrastructure dev-profile
+
+run-ci:
+    act --artifact-server-path=$PWD/act-artifacts pull_request --job stack-test
diff --git a/package.nix b/package.nix
index ab7fbba..5d82b99 100644
--- a/package.nix
+++ b/package.nix
@@ -41,6 +41,13 @@ in
   app = hlib.justStaticExecutables hpkgs.stackage-server;
   shell = hpkgs.shellFor {
     packages = p: [ p.stackage-server ];
-    buildInputs = [ pkgs.cabal-install pkgs.haskell-language-server pkgs.ghcid pkgs.haskellPackages.yesod-bin pkgs.postgresql ];
+    buildInputs = [
+      pkgs.cabal-install
+      pkgs.haskell-language-server
+      pkgs.ghcid
+      pkgs.haskellPackages.yesod-bin
+      pkgs.postgresql
+      pkgs.just
+    ];
   };
 }