Install gem em-websocket failed

Question

uilding native extensions. This could take a while... ERROR: Error installing em-websocket: ERROR: Failed to build gem native extension.

current directory: /var/lib/gems/2.3.0/gems/http_parser.rb-0.6.0/ext/ruby_http_parser

/usr/bin/ruby2.3 -r ./siteconf20180102-2602-1tzoncz.rb extconf.rb creating Makefile

current directory: /var/lib/gems/2.3.0/gems/http_parser.rb-0.6.0/ext/ruby_http_parser make "DESTDIR=" clean sh: 1: make: not found

current directory: /var/lib/gems/2.3.0/gems/http_parser.rb-0.6.0/ext/ruby_http_parser make "DESTDIR=" sh: 1: make: not found

make failed, exit code 127

Gem files will remain installed in /var/lib/gems/2.3.0/gems/http_parser.rb-0.6.0 for inspection. Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/http_parser.rb-0.6.0/gem_make.out

Answer 1

Looks like the error make: not found, which means the make program is missing.

You can fix it by running this command sudo apt-get install build-essential