ERROR: Error installing rails:
ERROR: Failed to build gem native extension.
current directory: C:/tools/ruby26/lib/ruby/gems/2.6.0/gems/nio4r-2.5.1/ext/nio4r
C:/tools/ruby26/bin/ruby.exe -I C:/tools/ruby26/lib/ruby/site_ruby/2.6.0 -r ./siteconf20190915-12824-1gfhksd.rb extconf.rb
current directory: C:/tools/ruby26/lib/ruby/gems/2.6.0/gems/nio4r-2.5.1/ext/nio4r
make "DESTDIR=" clean
current directory: C:/tools/ruby26/lib/ruby/gems/2.6.0/gems/nio4r-2.5.1/ext/nio4r
make "DESTDIR="
make failedNo such file or directory - make "DESTDIR="
Gem files will remain installed in C:/tools/ruby26/lib/ruby/gems/2.6.0/gems/nio4r-2.5.1 for inspection.
Results logged to C:/tools/ruby26/lib/ruby/gems/2.6.0/extensions/x64-mingw32/2.6.0/nio4r-2.5.1/gem_make.out