diff --git a/.github/workflows/wheels.yml b/.github/workflows/wheels.yml
index 1536a7f..b679961 100644
--- a/.github/workflows/wheels.yml
+++ b/.github/workflows/wheels.yml
@@ -93,7 +93,7 @@ jobs:
       env:
         CIBW_BUILD_VERBOSITY: 1
         # add compiled libmagic to the build directory (to include in the wheel)
-        CIBW_BEFORE_BUILD: ${{ ( startsWith( matrix.os, 'macos' ) && 'sudo mkdir -m 777 /usr/local/lib /usr/local/include /usr/local/share/misc && bash add_libmagic.sh' ) || 'bash add_libmagic.sh' }}
+        CIBW_BEFORE_BUILD: ${{ ( startsWith( matrix.os, 'macos' ) && 'sudo chmod -R 777 /usr && bash add_libmagic.sh' ) || 'bash add_libmagic.sh' }}
         # build macos wheels with maximum backwards compatibility (gcc -mmacosx-version-min flag)
         MACOSX_DEPLOYMENT_TARGET: ${{ ( endsWith( matrix.only, 'arm64' ) && '11.0' ) || '10.9' }}
         # simple smoke test run on each wheel: this is an HLS MP4 video, only recognised in recent versions of libmagic