anchor.diff:        # no package has `doCheck = true`.
         doCheck' = doCheck && stdenv.hostPlatform == stdenv.buildPlatform;
         doInstallCheck' = doInstallCheck && stdenv.hostPlatform == stdenv.buildPlatform;
  +
  +      outputs' =
  +        outputs ++
  +        (if separateDebugInfo then assert stdenv.hostPlatform.isLinux; [ "debug" ] else []);
   
         fixedOutputDrv = attrs ? outputHash;
         noNonNativeDeps = builtins.length (depsBuildTarget ++ depsBuildTargetPropagated
  
positive.code:           (map (drv: drv.__spliced.targetTarget or drv) depsTargetTargetPropagated)
          ]
        ];
  
        outputs' =
          outputs ++
          (if separateDebugInfo then assert stdenv.hostPlatform.isLinux; [ "debug" ] else []);
  
        computedSandboxProfile =
          lib.concatMap (input: input.__propagatedSandboxProfile or [])
  
negative.code:       doCheck = doCheck';
        doInstallCheck = doInstallCheck';
  
        outputs = outputs';
  
        references = nativeBuildInputs ++ buildInputs
                  ++ propagatedNativeBuildInputs ++ propagatedBuildInputs;
  
  