diff --git a/.github/workflows/macosx.yml b/.github/workflows/macosx.yml
index 24fa6ddd..c477157c 100644
--- a/.github/workflows/macosx.yml
+++ b/.github/workflows/macosx.yml
@@ -22,6 +22,7 @@ jobs:
           CFLAGS: "-fprofile-instr-generate -fcoverage-mapping"
           LDFLAGS: "-fprofile-instr-generate -fcoverage-mapping"
         run: |
+          export PKG_CONFIG_PATH="$(brew --prefix)/opt/libxml2/lib/pkgconfig"
           python -m build
           rm -rf build/
       - name: Set environment variables
@@ -40,5 +41,5 @@ jobs:
       - name: Report coverage to codecov
         run: |
           /Library/Developer/CommandLineTools/usr/bin/llvm-profdata merge -sparse ${{ env.LLVM_PROFILE_FILE }} -output pyxmlsec.profdata
-          /Library/Developer/CommandLineTools/usr/bin/llvm-cov show ${{ env.PYXMLSEC_LIBFILE }} -instr-profile=pyxmlsec.profdata src > coverage.txt
+          /Library/Developer/CommandLineTools/usr/bin/llvm-cov show ${{ env.PYXMLSEC_LIBFILE }} --arch=$(uname -m) --instr-profile=pyxmlsec.profdata src > coverage.txt
           bash <(curl -s https://codecov.io/bash) -f coverage.txt