diff --git a/.github/workflows/ibis-docs-pr.yml b/.github/workflows/ibis-docs-pr.yml
index 887a2c784a268..82de9d9e3e2dd 100644
--- a/.github/workflows/ibis-docs-pr.yml
+++ b/.github/workflows/ibis-docs-pr.yml
@@ -36,10 +36,10 @@ jobs:
       - name: checkout
         uses: actions/checkout@v4
 
-      - name: run doctest
+      - name: run doctests
         # keep HOME because duckdb (which we use for doctests) wants to use
         # that for extensions
-        run: nix develop --ignore-environment --keep HOME --keep HYPOTHESIS_PROFILE -c just doctest
+        run: nix develop '.#ibis310' --ignore-environment --keep HOME --keep HYPOTHESIS_PROFILE -c just doctest
 
       - name: generate api docs
         run: nix develop --ignore-environment -c just docs-apigen --verbose