diff --git a/.github/workflows/build_osx.yml b/.github/workflows/build_osx.yml
index e15635d2a3..ad1dcddf3e 100644
--- a/.github/workflows/build_osx.yml
+++ b/.github/workflows/build_osx.yml
@@ -61,11 +61,24 @@ jobs:
           key: ${GITHUB_WORKFLOW}-${{ matrix.os }}
 
       - name: Run Build Script
+        shell: bash
         run: |
           if [ "${{ matrix.os }}" == "macos" ]; then
             DARWIN_C_SOURCE=-D_DARWIN_C_SOURCE
           fi
-          CXXFLAGS="-O3" CFLAGS="-O3 ${DARWIN_C_SOURCE}" ADD_COMMIT_SHA=1 BUILD_CFG=Release python3 ./nix/build-all.py --diskcleanup
+          set -o pipefail
+          CXXFLAGS="-O3" CFLAGS="-O3 ${DARWIN_C_SOURCE}" ADD_COMMIT_SHA=1 BUILD_CFG=Release python3 ./nix/build-all.py -v --diskcleanup | tee build.log
+
+      - name: Upload Build Logs
+        if: always()
+        uses: actions/upload-artifact@v4
+        with:
+          name: build-logs-osx-${{ matrix.arch }}
+          path: |
+            build.log
+            build/*/*/*/logs/*.log
+            build/*/*/*/build/ifcopenshell/**/CMakeCache.txt
+          retention-days: 30
 
       - name: Pack Dependencies
         run: |