diff --git a/.github/workflows/nix.yml b/.github/workflows/nix.yml
index 48654b89..72cf325f 100644
--- a/.github/workflows/nix.yml
+++ b/.github/workflows/nix.yml
@@ -46,7 +46,8 @@ jobs:
         nix-build \
         -I nixpkgs=https://github.com/NixOS/nixpkgs/tarball/nixos-21.05 \
         release.nix \
-        --argstr compiler ${{ matrix.versions.compiler }}
+        --argstr compiler ${{ matrix.versions.compiler }} \
+        --arg packages "haskellPackages: haskellPackages.ihaskell"
         nix-shell \
         -I nixpkgs=https://github.com/NixOS/nixpkgs/tarball/nixos-21.05 \
         -p jq --run \