There are two different source RPMs in play here: These three binaries are built from rubygem-bcrypt_pbkdf-1.1.0-bp156.3.3.src: ruby2.5-rubygem-bcrypt_pbkdf ruby2.5-rubygem-bcrypt_pbkdf-doc ruby2.5-rubygem-bcrypt_pbkdf-testsuite And these three are built from a different source RPM, rubygem-bcrypt_pbkdf-1.1-1.1.0-bp156.3.3.src: ruby2.5-rubygem-bcrypt_pbkdf-1.1 ruby2.5-rubygem-bcrypt_pbkdf-doc-1.1 ruby2.5-rubygem-bcrypt_pbkdf-testsuite-1.1