diff --git a/Util/BuildTools/Setup.sh b/Util/BuildTools/Setup.sh
index 42147adbc..2859edd3c 100755
--- a/Util/BuildTools/Setup.sh
+++ b/Util/BuildTools/Setup.sh
@@ -57,6 +57,7 @@ pushd ${CARLA_BUILD_FOLDER} >/dev/null
 
 LLVM_INCLUDE="$UE4_ROOT/Engine/Source/ThirdParty/Linux/LibCxx/include/c++/v1"
 LLVM_LIBPATH="$UE4_ROOT/Engine/Source/ThirdParty/Linux/LibCxx/lib/Linux/x86_64-unknown-linux-gnu"
+UNREAL_HOSTED_CFLAGS="--sysroot=$UE4_ROOT/Engine/Extras/ThirdPartyNotUE/SDKs/HostLinux/Linux_x64/v17_clang-10.0.1-centos7/x86_64-unknown-linux-gnu/"
 
 # ==============================================================================
 # -- Get boost includes --------------------------------------------------------
@@ -173,7 +174,7 @@ else
   pushd ${RPCLIB_BASENAME}-libcxx-build >/dev/null
 
   cmake -G "Ninja" \
-      -DCMAKE_CXX_FLAGS="-fPIC -std=c++14 -stdlib=libc++ -I${LLVM_INCLUDE} -Wl,-L${LLVM_LIBPATH} -DBOOST_NO_EXCEPTIONS -DASIO_NO_EXCEPTIONS" \
+      -DCMAKE_CXX_FLAGS="-fPIC -std=c++14 -stdlib=libc++ -I${LLVM_INCLUDE} -Wl,-L${LLVM_LIBPATH} -DBOOST_NO_EXCEPTIONS -DASIO_NO_EXCEPTIONS ${UNREAL_HOSTED_CFLAGS}" \
       -DCMAKE_INSTALL_PREFIX="../${RPCLIB_BASENAME}-libcxx-install" \
       ../${RPCLIB_BASENAME}-source
 
@@ -237,7 +238,7 @@ else
   pushd ${GTEST_BASENAME}-libcxx-build >/dev/null
 
   cmake -G "Ninja" \
-      -DCMAKE_CXX_FLAGS="-std=c++14 -stdlib=libc++ -I${LLVM_INCLUDE} -Wl,-L${LLVM_LIBPATH} -DBOOST_NO_EXCEPTIONS -fno-exceptions" \
+      -DCMAKE_CXX_FLAGS="-std=c++14 -stdlib=libc++ -I${LLVM_INCLUDE} -Wl,-L${LLVM_LIBPATH} -DBOOST_NO_EXCEPTIONS -fno-exceptions ${UNREAL_HOSTED_CFLAGS}" \
       -DCMAKE_INSTALL_PREFIX="../${GTEST_BASENAME}-libcxx-install" \
       ../${GTEST_BASENAME}-source
 
@@ -530,7 +531,7 @@ if ${USE_CHRONO} ; then
     pushd ${CHRONO_SRC_DIR}/build >/dev/null
 
     cmake -G "Ninja" \
-        -DCMAKE_CXX_FLAGS="-fPIC -std=c++14 -stdlib=libc++ -I${LLVM_INCLUDE} -L${LLVM_LIBPATH} -Wno-unused-command-line-argument" \
+        -DCMAKE_CXX_FLAGS="-fPIC -std=c++14 -stdlib=libc++ -I${LLVM_INCLUDE} -L${LLVM_LIBPATH} -Wno-unused-command-line-argument ${UNREAL_HOSTED_CFLAGS}" \
         -DEIGEN3_INCLUDE_DIR="../../${EIGEN_INCLUDE}" \
         -DCMAKE_INSTALL_PREFIX="../../${CHRONO_INSTALL_DIR}" \
         -DCMAKE_BUILD_TYPE=Release \
@@ -840,9 +841,9 @@ cp ${LIBSTDCPP_TOOLCHAIN_FILE}.gen ${LIBCPP_TOOLCHAIN_FILE}.gen
 cat >>${LIBCPP_TOOLCHAIN_FILE}.gen <<EOL
 
 set(CMAKE_CXX_FLAGS "\${CMAKE_CXX_FLAGS} -stdlib=libc++" CACHE STRING "" FORCE)
-set(CMAKE_CXX_FLAGS "\${CMAKE_CXX_FLAGS} -isystem ${LLVM_INCLUDE}" CACHE STRING "" FORCE)
+set(CMAKE_CXX_FLAGS "\${CMAKE_CXX_FLAGS} -isystem ${LLVM_INCLUDE} ${UNREAL_HOSTED_CFLAGS}" CACHE STRING "" FORCE)
 set(CMAKE_CXX_FLAGS "\${CMAKE_CXX_FLAGS} -fno-exceptions" CACHE STRING "" FORCE)
-set(CMAKE_CXX_LINK_FLAGS "\${CMAKE_CXX_LINK_FLAGS} -L${LLVM_LIBPATH}" CACHE STRING "" FORCE)
+set(CMAKE_CXX_LINK_FLAGS "\${CMAKE_CXX_LINK_FLAGS} -L${LLVM_LIBPATH} ${UNREAL_HOSTED_CFLAGS}" CACHE STRING "" FORCE)
 set(CMAKE_CXX_LINK_FLAGS "\${CMAKE_CXX_LINK_FLAGS} -lc++ -lc++abi" CACHE STRING "" FORCE)
 EOL