diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index abec8d28..b47ae9c0 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -35,7 +35,7 @@ jobs:
       - name: Build wheels
         run: python -m cibuildwheel --output-dir wheelhouse
         env:
-          CIBW_ENVIRONMENT: |
+          CIBW_ENVIRONMENT: >-
             MACOSX_DEPLOYMENT_TARGET=${{ matrix.macos-target }}
             CMAKE_PREFIX_PATH=${{ matrix.openblas-path }}