diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 6bbb96de..faa9d62a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -75,6 +75,12 @@
 					name: install dependencies,
 					run: brew install scons SFML
 				},
+				{
+					run: 'ls ${{ steps.boost.outputs.root }}'
+				},
+				{
+					run: 'ls ${{ steps.boost.outputs.root }}/include'
+				},
 				{
 					name: build and unit test,
 					run: './.github/workflows/scripts/mac/scons-build.sh INCLUDEPATH="${{ steps.boost.outputs.root }}/include" LIBPATH="${{ steps.boost.outputs.librarydir }}"',
diff --git a/.github/workflows/scripts/mac/scons-build.sh b/.github/workflows/scripts/mac/scons-build.sh
index c95901b7..4cdf6d32 100755
--- a/.github/workflows/scripts/mac/scons-build.sh
+++ b/.github/workflows/scripts/mac/scons-build.sh
@@ -4,5 +4,4 @@ export CC="$(brew --prefix llvm)/bin/clang"
 export CXX="$(brew --prefix llvm)/bin/clang++"
 export SDKROOT="$(xcrun --show-sdk-path)"
 
-echo $@
 scons CXXFLAGS="-I/usr/local/opt/zlib/include" LINKFLAGS="-L/usr/local/opt/zlib/lib" $@