diff --git a/.gitignore b/.gitignore
index 432d932..f2fc71b 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 dist-newstyle
-.direnv
\ No newline at end of file
+.direnv
+*.cabal
\ No newline at end of file
diff --git a/numbersquare.cabal b/numbersquare.cabal
deleted file mode 100644
index 47f5833..0000000
--- a/numbersquare.cabal
+++ /dev/null
@@ -1,24 +0,0 @@
-cabal-version:      3.0
-name:               numbersquare
-
-version:            0.1.0.0
-
-license:            BSD-3-Clause
-license-file:       LICENSE
-author:             sid
-category:           Game
-build-type:         Simple
-
-extra-doc-files:    CHANGELOG.md
-
-common warnings
-    ghc-options: -Wall
-
-executable numbersquare
-    import:           warnings
-
-    main-is:          Main.hs
-
-    build-depends:    base ^>=4.20.2.0
-    hs-source-dirs:   app
-    default-language: Haskell2010
diff --git a/package.yaml b/package.yaml
new file mode 100644
index 0000000..34028cc
--- /dev/null
+++ b/package.yaml
@@ -0,0 +1,36 @@
+name: numbersquare
+version: "0.1.0"
+category: Games
+synopsis: "a game where you number square"
+description: "a game where you number square"
+license: BSD3
+author: skulk
+
+ghc-options: "-Wall"
+
+dependencies:
+  - "base == 4.*"
+  - random
+  - array
+  - text
+
+library:
+  source-dirs:
+    - src
+
+executable:
+  source-dirs:
+    - app
+  main: Main.hs
+
+tests:
+  spec:
+    main: "Spec.hs"
+    ghc-options: "-threaded -O0"
+    source-dirs:
+      - src
+      - test
+
+    dependencies:
+      - hspec >= 2.1.8
+      - QuickCheck
diff --git a/shell.nix b/shell.nix
index bddc07b..ebe7263 100644
--- a/shell.nix
+++ b/shell.nix
@@ -16,6 +16,7 @@ haskellPackages.developPackage {
             fourmolu
             haskell-language-server
             cabal-install
+            hpack
             ghcid
             cabal-fmt
           ]