diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0c2b0ce2..c949c29c 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -102,10 +102,10 @@ jobs:
       - run:
           name: Build Wheels
           command: |
-            if [[ -z "${CIRCLE_PULL_REQUEST}" ]]; then
+            if [[ -z "${CIRCLE_PR_NUMBER}" ]]; then
               echo "$DOCKER_PASSWORD" | docker login -u="$DOCKER_USERNAME" --password-stdin;
             fi
-            ./ci/travis/build-manylinux.sh
+            ./ci/build-manylinux.sh
       - run:
           name: Upload Wheels
           command: |
diff --git a/ci/build-manylinux.sh b/ci/build-manylinux.sh
index 38a6877f..ef2a36cf 100755
--- a/ci/build-manylinux.sh
+++ b/ci/build-manylinux.sh
@@ -7,6 +7,6 @@ python ci/appveyor/fix_version.py .
 
 docker pull $docker_tag || echo
 docker build --pull --cache-from $docker_tag ci/docker/manylinux -t $docker_tag
-if [[ -z "$CIRCLE_PULL_REQUEST" ]]; then docker push $docker_tag; fi
+if [[ -z "$CIRCLE_PR_NUMBER" ]]; then docker push $docker_tag; fi
 docker run --rm -v `pwd`:/io $docker_tag /io/ci/build-wheels.sh
 ls wheelhouse/