Airplay Install Error cannot create /usr/local/man/man1

Question

I was following this tutorial to clone Alexa. At the bottom, I was installing AirPlay with this command:

sudo ./Build install

I got this error:

Building Net-SDP
!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
ERROR: Can't create '/usr/local/man/man1'
mkdir /usr/local/man: File exists at /usr/share/perl/5.20/ExtUtils/Install.pm line 476.

!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
 at /usr/share/perl5/Module/Build/Base.pm line 3560.

I used the file manager to go to usr/local and found that man has a red triangular symbol, which says symbolic link. This might be related to the error.

How do I fix this?