makefile-为什么read命令不读取用户输入?

我在makefile中有以下代码:

# Root Path
echo "What is the root directory of your webserver? Eg. ~/Server/htdocs" ;
read root_path ;
echo $root_path ;
if [ ! -d $root_path ] ; then \
    echo "Error: Could not find that location!" ; exit 1 ; \
fi

但是,当输入任何内容(如“asd”)时,返回的内容是:

What is the root directory of your webserver? Eg. ~/Server/htdocs

asd
oot_path
Error: Could not find that location!

我希望看到的是:

What is the root directory of your webserver? Eg. ~/Server/htdocs

asd
asd
Error: Could not find that location!

我该怎么解决这个问题????