diff --git a/.github/workflows/native-build.yml b/.github/workflows/native-build.yml
index e6e035c6..f12c45d3 100644
--- a/.github/workflows/native-build.yml
+++ b/.github/workflows/native-build.yml
@@ -17,10 +17,10 @@ jobs:
       - uses: cachix/install-nix-action@v12
         with:
           nix_path: nixpkgs=channel:nixos-unstable
-      - uses: actions/setup-haskell@v1.1
-        with:
-          enable-stack: true
-          stack-version: latest
+      # - uses: actions/setup-haskell@v1.1
+      #   with:
+      #     enable-stack: true
+      #     stack-version: latest
       
       # Tasks
       - run: nix-shell --run "just install-deps"
diff --git a/shell.nix b/shell.nix
index 6aad01db..e724acd1 100644
--- a/shell.nix
+++ b/shell.nix
@@ -21,5 +21,8 @@ in
       pkgs.nodejs-14_x
       pkgs.yarn
 
+      # Indirect dependencies
+      pkgs.gmp
+
     ];
   }