diff --git a/packages/alfa-toolchain/package.json b/packages/alfa-toolchain/package.json
index 42f10bfc4e..93ef591e1f 100644
--- a/packages/alfa-toolchain/package.json
+++ b/packages/alfa-toolchain/package.json
@@ -39,6 +39,8 @@
     "@changesets/git": "^2.0.0",
     "@changesets/read": "^0.5.9",
     "@manypkg/get-packages": "=1.1.3",
+    "@siteimprove/alfa-array": "workspace:^0.69.0",
+    "@siteimprove/alfa-option": "workspace:^0.69.0",
     "@siteimprove/alfa-result": "workspace:^0.69.0",
     "@svitejs/changesets-changelog-github-compact": "^1.1.0",
     "resolve-from": "^5.0.0"
diff --git a/packages/alfa-toolchain/tsconfig.json b/packages/alfa-toolchain/tsconfig.json
index fde6dc96ff..1cbcd4a71b 100644
--- a/packages/alfa-toolchain/tsconfig.json
+++ b/packages/alfa-toolchain/tsconfig.json
@@ -22,6 +22,8 @@
     "test/changeset/get-changeset-details.spec.tsx"
   ],
   "references": [
+    { "path": "../alfa-array" },
+    { "path": "../alfa-option" },
     { "path": "../alfa-result" },
     { "path": "../alfa-test" }
   ]