Ruby question: solution for dependency version specs?

[Sergio Had]

Any Ruby experts among us?

Some Ruby ports hardcode versions for dependencies in a form restricting those to a given major or minor version. Since many Ruby gems are not updated for years (but still required for other stuff), this presents a problem: any dependency using those will build but not run.
Is there a way to solve this other than by patching every such instance? Patching works but is pretty tedious.
Ideally a solution via Ruby PG is preferred, I think.
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