I'm new to Haskell and looking to dive into the pandoc project.  I have the code downloaded and tried to build it using stack setup/stack install, but I'm not entirely sure it was successful because it fails to write to a directory

AppData\\Local\\Programs\\stack\\x86_64-windows\\ghc-8.6.5\\": permission denied (Access is denied.)

I already have ghc 8.6.5 and stack 1.9.3 installed on my computer so maybe I can ignore this.  Did I build the project correctly or am I missing something?