diff --git a/.github/workflows/build_all.yml b/.github/workflows/build_all.yml
index 3431eaf5..eefe99b3 100644
--- a/.github/workflows/build_all.yml
+++ b/.github/workflows/build_all.yml
@@ -37,6 +37,9 @@ jobs:
           curl -o Xcode10.app.tar.gz --insecure https://mcx.space/dev/ci/Xcode10.app.tar.gz
           tar zxf Xcode10.app.tar.gz
           rm -rf Xcode10.app.tar.gz
+          sudo xcode-select --print-path
+          which ar
+          which ranlib
           sudo xcode-select -s $PWD/Xcode.app/Contents/Developer/
           echo "$PWD/Xcode.app/Contents/Developer/usr/bin" >> $GITHUB_PATH
           echo "$PWD/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/" >> $GITHUB_PATH