diff --git a/.circleci/config.yml b/.circleci/config.yml
index 24623490bd70cfbb73faced9f9f30efb5f760aaf..f143df3ca94bbd145fa143ecb8411a983e2558fa 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -84,6 +84,7 @@ jobs:
             --no-terminal \
             --only-dependencies \
             --fast \
+            --jobs 1 \
             --interleaved-output"
             nix-shell shell.nix --run "$BUILD"