Better CircleCI workspace usage

.circleci/config.yml

@@ -74,11 +74,14 @@ jobs:
       - persist_to_workspace:
           root: .
           paths:
-            - ./*
+            - ./build
+            - ./pyodide-env
+            - ./firefox
 
   test-firefox:
     <<: *defaults
     steps:
+      - checkout
       - attach_workspace:
           at: .
       - run:
@@ -95,8 +98,9 @@ jobs:
   test-chrome:
     <<: *defaults
     steps:
+      - checkout
       - attach_workspace:
-          at: ~/repo/build
+          at: .
       - run:
           name: test
           command: |
@@ -113,6 +117,9 @@ jobs:
       enabled: true
 
     steps:
+      - checkout
+      - attach_workspace:
+          at: .
       - run:
           name: Deploy to Github Pages
           command: |