I just tried to upgrade from 3.6 to 3.73 and got an error. I’m working on upgrading ruby at the moment hopefully that is the problem.
Maybe I didn’t have devkit installed.
gem install jekyll Fetching: jekyll-watch-2.0.0.gem (100%) Successfully installed jekyll-watch-2.0.0 Fetching: concurrent-ruby-1.0.5.gem (100%) Successfully installed concurrent-ruby-1.0.5 Fetching: i18n-0.9.5.gem (100%) Successfully installed i18n-0.9.5 Fetching: eventmachine-1.2.5-x64-mingw32.gem (100%) Successfully installed eventmachine-1.2.5-x64-mingw32 Fetching: http_parser.rb-0.6.0.gem (100%) Building native extensions. This could take a while... ERROR: Error installing jekyll: ERROR: Failed to build gem native extension. C:/Ruby22-x64/bin/ruby.exe -r ./siteconf20180409-20992-150n16a.rb extconf.rb creating Makefile make "DESTDIR=" clean make "DESTDIR=" generating ruby_http_parser-x64-mingw32.def compiling ruby_http_parser.c make: x86_64-w64-mingw32-gcc: Command not found make: *** [ruby_http_parser.o] Error 127 make failed, exit code 2 Gem files will remain installed in C:/Ruby22-x64/lib/ruby/gems/2.2.0/gems/http_parser.rb-0.6.0 for inspection. Results logged to C:/Ruby22-x64/lib/ruby/gems/2.2.0/extensions/x64-mingw32/2.2.0/http_parser.rb-0.6.0/gem_make.out PS S:\> jekyll -V jekyll 3.6.0 | Error: Whoops, we can't understand your command. jekyll 3.6.0 | Error: invalid option: -V jekyll 3.6.0 | Error: Run your command again with the --help switch to see available options.