diff --git a/.gitignore b/.gitignore
index f2fc71b..04eb3c2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,3 @@
 dist-newstyle
 .direnv
-*.cabal
\ No newline at end of file
+*.cabal
diff --git a/flake.lock b/flake.lock
index c6c4490..63fe929 100644
--- a/flake.lock
+++ b/flake.lock
@@ -16,7 +16,62 @@
         "type": "github"
       }
     },
+    "flake-utils": {
+      "inputs": {
+        "systems": "systems"
+      },
+      "locked": {
+        "lastModified": 1731533236,
+        "narHash": "sha256-l0KFg5HjrsfsO/JpG+r7fRrqm12kzFHyUHqHCVpMMbI=",
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "rev": "11707dc2f618dd54ca8739b309ec4fc024de578b",
+        "type": "github"
+      },
+      "original": {
+        "owner": "numtide",
+        "repo": "flake-utils",
+        "type": "github"
+      }
+    },
+    "ghc-wasm-meta": {
+      "inputs": {
+        "flake-utils": "flake-utils",
+        "nixpkgs": "nixpkgs"
+      },
+      "locked": {
+        "host": "gitlab.haskell.org",
+        "lastModified": 1775305067,
+        "narHash": "sha256-KFWRYVYPgsXu51stX/7/416qc31HFltfQiHPc6nEmH0=",
+        "owner": "haskell-wasm",
+        "repo": "ghc-wasm-meta",
+        "rev": "60098a5076557e327b326a1a3ba3b5fb4fec1e49",
+        "type": "gitlab"
+      },
+      "original": {
+        "host": "gitlab.haskell.org",
+        "owner": "haskell-wasm",
+        "repo": "ghc-wasm-meta",
+        "type": "gitlab"
+      }
+    },
     "nixpkgs": {
+      "locked": {
+        "lastModified": 1774399958,
+        "narHash": "sha256-Q+g1Np4wyNYpylt8RFM8UprAmyRoA3q3EZj7lQV+ZuQ=",
+        "owner": "NixOS",
+        "repo": "nixpkgs",
+        "rev": "735a15e91bcb1b3e0883a91d3c9dfd4475d1bc54",
+        "type": "github"
+      },
+      "original": {
+        "owner": "NixOS",
+        "ref": "nixpkgs-25.11-darwin",
+        "repo": "nixpkgs",
+        "type": "github"
+      }
+    },
+    "nixpkgs_2": {
       "locked": {
         "lastModified": 1777268161,
         "narHash": "sha256-bxrdOn8SCOv8tN4JbTF/TXq7kjo9ag4M+C8yzzIRYbE=",
@@ -35,7 +90,23 @@
     "root": {
       "inputs": {
         "flake-compat": "flake-compat",
-        "nixpkgs": "nixpkgs"
+        "ghc-wasm-meta": "ghc-wasm-meta",
+        "nixpkgs": "nixpkgs_2"
+      }
+    },
+    "systems": {
+      "locked": {
+        "lastModified": 1681028828,
+        "narHash": "sha256-Vy1rq5AaRuLzOxct8nz4T6wlgyUR7zLU309k9mBC768=",
+        "owner": "nix-systems",
+        "repo": "default",
+        "rev": "da67096a3b9bf56a91d16901293e51ba5b49a27e",
+        "type": "github"
+      },
+      "original": {
+        "owner": "nix-systems",
+        "repo": "default",
+        "type": "github"
       }
     }
   },
diff --git a/flake.nix b/flake.nix
index afba6cb..425f2d0 100644
--- a/flake.nix
+++ b/flake.nix
@@ -3,6 +3,8 @@
 
   inputs = {
     nixpkgs.url = "github:nixos/nixpkgs?ref=nixos-unstable";
+    ghc-wasm-meta.url = "gitlab:haskell-wasm/ghc-wasm-meta?host=gitlab.haskell.org";
+
     flake-compat = {
       url = "github:NixOS/flake-compat";
       flake = false;
@@ -10,11 +12,20 @@
   };
 
   outputs =
-    { self, nixpkgs, ... }:
+    {
+      self,
+      nixpkgs,
+      ghc-wasm-meta,
+      ...
+    }:
     let
       pkgs = nixpkgs.legacyPackages.x86_64-linux;
     in
     {
-      devShells.x86_64-linux.default = pkgs.callPackage ./shell.nix { };
+      inherit ghc-wasm-meta;
+      devShells.x86_64-linux.default = pkgs.callPackage ./shell.nix {
+        wasm32-wasi-cabal = ghc-wasm-meta.packages.x86_64-linux.wasm32-wasi-cabal-9_14;
+        wasm32-wasi-ghc = ghc-wasm-meta.packages.x86_64-linux.wasm32-wasi-ghc-9_14;
+      };
     };
 }
diff --git a/numbersquare.cabal b/numbersquare.cabal
index 799db3b..594931d 100644
--- a/numbersquare.cabal
+++ b/numbersquare.cabal
@@ -100,7 +100,7 @@ test-suite numberspec-test
       OverloadedLabels
       NamedFieldPuns
       TypeOperators
-  ghc-options: -Wall -threaded -O0
+  ghc-options: -Wall -O0
   build-depends:
       QuickCheck
     , array
diff --git a/package.yaml b/package.yaml
index 05e7b0d..4dbaee7 100644
--- a/package.yaml
+++ b/package.yaml
@@ -31,6 +31,8 @@ default-extensions:
   - NamedFieldPuns
   - TypeOperators
 
+build-type: Simple
+
 library:
   source-dirs:
     - src
@@ -43,7 +45,7 @@ executable:
 tests:
   numberspec-test:
     main: "Main.hs"
-    ghc-options: "-threaded -O0"
+    ghc-options: "-O0"
     source-dirs:
       - test
 
diff --git a/shell.nix b/shell.nix
index 00a07b7..7f913a0 100644
--- a/shell.nix
+++ b/shell.nix
@@ -3,6 +3,8 @@
   haskell,
   zlib,
   watchexec,
+  wasm32-wasi-cabal,
+  wasm32-wasi-ghc,
 }:
 haskellPackages.developPackage {
   name = "numbersquare";
@@ -12,7 +14,11 @@ haskellPackages.developPackage {
       addBuildTools =
         drv:
         haskell.lib.addBuildTools drv (
-          [ watchexec ]
+          [
+            watchexec
+            wasm32-wasi-cabal
+            wasm32-wasi-ghc
+          ]
           ++ (with haskellPackages; [
             fourmolu
             haskell-language-server