diff --git a/scripts/pinned_build.sh b/scripts/pinned_build.sh
index 15159851ab..0117067c66 100755
--- a/scripts/pinned_build.sh
+++ b/scripts/pinned_build.sh
@@ -75,6 +75,8 @@ install_clang() {
       try tar -xvf ${CLANG_FN} -C ${CLANG_DIR}
       pushdir ${CLANG_DIR}
       mv clang+*/* .
+      #prevent LLVM bundled with clang from being discovered by cmake
+      try rm -r lib/cmake
       popdir ${DEP_DIR}
       rm ${CLANG_FN}
    fi
@@ -132,7 +134,7 @@ pushdir ${LEAP_DIR}
 
 # build Leap
 echo "Building Leap ${SCRIPT_DIR}"
-try cmake -DCMAKE_TOOLCHAIN_FILE=${SCRIPT_DIR}/pinned_toolchain.cmake -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH=${LLVM_DIR}/lib/cmake -DCMAKE_PREFIX_PATH=${BOOST_DIR}/bin ${SCRIPT_DIR}/..
+try cmake -DCMAKE_TOOLCHAIN_FILE=${SCRIPT_DIR}/pinned_toolchain.cmake -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DCMAKE_PREFIX_PATH="${LLVM_DIR}/lib/cmake;${BOOST_DIR}/bin" ${SCRIPT_DIR}/..
 
 try make -j${JOBS}
 try cpack