Fix mac arm64

.github/workflows/build-wheels.yml

@@ -255,19 +255,25 @@ jobs:
     # It is not documented in Github that openssl 3 is installed in their macos images
     # so we install it here to be safe
     - if: ${{ startsWith(inputs.platform-tag, 'macosx') }}
-      name: Ensure openssl 3 is installed on Github macOS runners.
-      run: brew install openssl@3
+      name: Ensure openssl is installed on Github macOS runners.
+      run: brew install openssl@${{ env.MACOS_OPENSSL_VERSION }}
+
+    - if: ${{ inputs.platform-tag == 'macosx_arm64' }}
+      name: Ensure that linker can find openssl
+      run: echo LIBRARY_PATH=$(brew --prefix openssl@${{ env.MACOS_OPENSSL_VERSION }}):$LIBRARY_PATH >> $GITHUB_ENV
 
     - name: Build wheel
       uses: pypa/cibuildwheel@v2.21.3
       env:
         CIBW_ENVIRONMENT_PASS_LINUX: ${{ inputs.unoptimized && 'UNOPTIMIZED' || '' }}
-        # We use delocate to repair the wheel because it throws an error if
+        # - We use delocate to repair the wheel because it throws an error if
         # the openssl library version is newer than the wheel's macOS version tag
         # Linking the static libraries produces a warning for that same reason that but it doesn't throw an error.
         # macOS wheel is only backwards compatible with the macOS major version it is built from
-        # Use single dash for backwards compatibility with older sw_vers
-        CIBW_ENVIRONMENT_MACOS: MACOSX_DEPLOYMENT_TARGET=$(sw_vers -productVersion | cut -d"." -f 1).0
+        # - Use single dash for backwards compatibility with older sw_vers
+        # - on mac m1, openssl@3 installed via brew is not in the linker's default library path
+        CIBW_ENVIRONMENT_MACOS: >
+          MACOSX_DEPLOYMENT_TARGET=$(sw_vers -productVersion | cut -d"." -f 1).0
         CIBW_BUILD: ${{ env.BUILD_IDENTIFIER }}
         CIBW_BUILD_FRONTEND: build
         CIBW_BEFORE_ALL_LINUX: >