ERROR: Failed to build gem native extension.

[gayanhewa]

I am getting the following build error, when building the docker image. Any idea why?

Building native extensions.  This could take a while...
ERROR:  Error installing gauntlt:
	ERROR: Failed to build gem native extension.

    current directory: /var/lib/gems/2.3.0/gems/childprocess-1.0.1/ext
/usr/bin/ruby2.3 mkrf_conf.rb

current directory: /var/lib/gems/2.3.0/gems/childprocess-1.0.1/ext
/usr/bin/ruby2.3 -rubygems /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake RUBYARCHDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/childprocess-1.0.1 RUBYLIBDIR=/var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/childprocess-1.0.1
/usr/bin/ruby2.3: No such file or directory -- /usr/share/rubygems-integration/all/gems/rake-10.5.0/bin/rake (LoadError)

rake failed, exit code 1

Gem files will remain installed in /var/lib/gems/2.3.0/gems/childprocess-1.0.1 for inspection.
Results logged to /var/lib/gems/2.3.0/extensions/x86_64-linux/2.3.0/childprocess-1.0.1/gem_make.out
The command '/bin/sh -c gem install gauntlt --no-rdoc --no-ri' returned a non-zero code: 1
make: *** [build] Error 1

[gayanhewa]

I had issues building gauntlt/gauntlt-docker but I was able to pull in gauntlt/gauntlt and working with that image, unsure of the difference between the two.

# This worked fine.
docker run -t --rm=true -v $(PWD):/working -w /working gauntlt/gauntlt ./sqli/form.attack