current directory: /app/vendor/bundle/ruby/2.3.0/gems/json-2.3.0/ext/json
/usr/local/bin/ruby -I /usr/local/lib/ruby/site_ruby/2.3.0 -r ./siteconf20200414-14-1z01kmt.rb extconf.rb
creating Makefile

current directory: /app/vendor/bundle/ruby/2.3.0/gems/json-2.3.0/ext/json
make "DESTDIR=" clean

current directory: /app/vendor/bundle/ruby/2.3.0/gems/json-2.3.0/ext/json
make "DESTDIR="
make: Nothing to be done for 'all'.

current directory: /app/vendor/bundle/ruby/2.3.0/gems/json-2.3.0/ext/json
make "DESTDIR=" install