diff --git a/script/ci_setup.sh b/script/ci_setup.sh
index 1162291..e05e9e0 100755
--- a/script/ci_setup.sh
+++ b/script/ci_setup.sh
@@ -2,11 +2,6 @@
 
 set -ex
 
-if [[ "${CXX}" == clang* ]]
-then
-    export CXXFLAGS="-stdlib=libc++"
-fi
-
 # Install dependencies
 apt-get update
 apt-get install -y --no-install-recommends \
@@ -16,6 +11,11 @@ apt-get install -y --no-install-recommends \
         libgl1-mesa-dev \
         libusb-1.0-0-dev
 
+if [[ "${CXX}" == clang* ]]
+then
+    export CXXFLAGS="-stdlib=libc++"
+fi
+
 git clone --depth=1 --branch=v1.15.0 https://github.com/google/googletest.git
 mkdir googletest/build
 cd googletest/build