diff --git a/noxfile.py b/noxfile.py
index b52a45e..50e6a17 100644
--- a/noxfile.py
+++ b/noxfile.py
@@ -82,10 +82,10 @@ def prepare_docs(session: nox.Session) -> None:
         )
 
 
-@nox.session(name="build-docs")
+@nox.session(name="build-docs", venv_backend="conda")
 def build_docs(session: nox.Session) -> None:
     """Build the docs."""
-    session.install("-r", "docs/requirements.txt")
+    session.conda_install("--file", "docs/requirements.txt")
     session.install("-e", ".")
 
     prepare_docs(session)