Support for different gem download URL pattern

When downloading gem from repository (Nexus 2 in my case) only this URL path is supported: http://../gems/s/swagger-diff-1.0.5.gem

But unfortunately gem-maven-plugin tries to download using: http://../gems/swagger-diff/1.0.5/swagger-diff-1.0.5.gem which is supported only in Nexus 3. Currently I can't move to Nexus 2 easily.

Any configuration settings to make gem-maven-plugin work with Nexus 2 URL pattern?