Permission denied @ rb_file_s_symlink

[godrick37]

I encountered this error when typing this command line "gem install faml -v '0.8.1' --source 'https://rubygems.org/'".
I run Windows 10 x64 19042 and Ruby 2.5.1 (x64).

current directory: D:/lib/Ruby25-x64/lib/ruby/gems/2.5.0/gems/faml-0.8.1/ext/attribute_builder
D:/lib/Ruby25-x64/bin/ruby.exe -I D:/lib/Ruby25-x64/lib/ruby/site_ruby/2.5.0 -r ./siteconf20201208-9864-1jbtsgn.rb extconf.rb
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of necessary
libraries and/or headers. Check the mkmf.log file for more details. You may
need configuration options.

Provided configuration options:
--with-opt-dir
--without-opt-dir
--with-opt-include
--without-opt-include=${opt-dir}/include
--with-opt-lib
--without-opt-lib=${opt-dir}/lib
--with-make-prog
--without-make-prog
--srcdir=.
--curdir
--ruby=D:/lib/Ruby25-x64/bin/$(RUBY_BASE_NAME)
D:/lib/Ruby25-x64/lib/ruby/2.5.0/fileutils.rb:323:in symlink': Permission denied @ rb_file_s_symlink - (D:/lib/Ruby25-x64/lib/ruby/gems/2.5.0/gems/faml-0.8.1/vendor/houdini/buffer.c, buffer.c) (Errno::EACCES) from D:/lib/Ruby25-x64/lib/ruby/2.5.0/fileutils.rb:323:in block in ln_s'
from D:/lib/Ruby25-x64/lib/ruby/2.5.0/fileutils.rb:1479:in fu_each_src_dest0' from D:/lib/Ruby25-x64/lib/ruby/2.5.0/fileutils.rb:321:in ln_s'
from extconf.rb:18:in block in <main>' from extconf.rb:17:in each'
from extconf.rb:17:in `

'

extconf failed, exit code 1