diff --git a/install.sh b/install.sh
index e7c5813..0204119 100755
--- a/install.sh
+++ b/install.sh
@@ -220,9 +220,9 @@ if [ "$1" = "install" ]; then
 
   # Use custom compiler paths if defined
   if [ "$_compiler_name" = "-llvm" ] && [ -n "${CUSTOM_LLVM_PATH}" ]; then
-    PATH=${CUSTOM_LLVM_PATH}/bin:${CUSTOM_LLVM_PATH}/lib:${CUSTOM_LLVM_PATH}/include:${PATH}
+    PATH="${CUSTOM_LLVM_PATH}/bin:${CUSTOM_LLVM_PATH}/lib:${CUSTOM_LLVM_PATH}/include:${PATH}"
   elif [ -n "${CUSTOM_GCC_PATH}" ]; then
-    PATH=${CUSTOM_GCC_PATH}/bin:${CUSTOM_GCC_PATH}/lib:${CUSTOM_GCC_PATH}/include:${PATH}
+    PATH="${CUSTOM_GCC_PATH}/bin:${CUSTOM_GCC_PATH}/lib:${CUSTOM_GCC_PATH}/include:${PATH}"
   fi
 
   if [ "$_force_all_threads" = "true" ]; then