هذا الخطا يظهر لى الكثير من المرات وبصراحة حاولت فيه كتير جدا واظن فنى فتحت كل اللينكات لحله وكل مرة يطلع نفس الخطا Gem::Ext::BuildError: ERROR: Failed to build gem native extension. C:/RailsInstaller/Ruby2.2.0/bin/ruby.exe -r ./siteconf20160828-7452-6fsnb7.rb extconf.rb creating Makefile make "DESTDIR=" clean 'make' is not recognized as an internal or external command, operable program or batch file. make "DESTDIR=" 'make' is not recognized as an internal or external command, operable program or batch file. make failed, exit code 1 Gem files will