/usr/share/ruby-build/jruby-1.7.4 is in ruby-build 20170726-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | install_package "jruby-1.7.4" "https://s3.amazonaws.com/jruby-org/downloads/1.7.4/jruby-bin-1.7.4.tar.gz#ef6dead787780f18a43758003689fd9ba40e64abc04cd41a6ff1eaf1557dfa69" warn_eol jruby
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