Fails to bootstrap on nixpkgs master because of missing `ghc884`

Describe the bug

ghc884 has been removed from nixpkgs on master. The bootstrap compiler will have to be bumped:

Lines 4 to 11 in 26e3f44

    
           buildBootstrapper = 
        
               if final.stdenv.buildPlatform.isAarch64 && final.stdenv.buildPlatform.isDarwin 
        
               then { 
        
                   compilerNixName = "ghc8107"; 
        
               } 
        
               else { 
        
                   compilerNixName = "ghc884"; 
        
               };

AFAICT the bootstrap compiler version is used as a minimum bound when checking the compiler version. Is bumping this going to be a breaking change?

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	buildBootstrapper =
	if final.stdenv.buildPlatform.isAarch64 && final.stdenv.buildPlatform.isDarwin
	then {
	compilerNixName = "ghc8107";
	}
	else {
	compilerNixName = "ghc884";
	};