anchor.diff:    staticUsrProfileTarget = nixpkgs.buildEnv {
       name = "${name}-usr-target";
       paths = [ etcPkg ] ++ basePkgs ++ targetPaths;
  +    extraOutputsToInstall = [ "lib" "out" ] ++ extraOutputsToInstall;
       ignoreCollisions = true;
     };
   
     staticUsrProfileMulti = nixpkgs.buildEnv {
       name = "system-profile-multi";
       paths = multiPaths;
  +    extraOutputsToInstall = [ "lib" "out" ] ++ extraOutputsToInstall;
       ignoreCollisions = true;
     };
   
  
positive.code: { name, profile ? ""
  , pkgs ? null, targetPkgs ? pkgs: [], multiPkgs ? pkgs: []
  , extraBuildCommands ? "", extraBuildCommandsMulti ? ""
  }:
  
  # HOWTO:
  
negative.code:     cp -rsHf ${staticUsrProfileTarget}/lib64/* lib64/ && chmod u+w -R lib64/
  
      # copy gcc libs
      cp -rsHf ${chosenGcc.cc.lib}/lib/*   lib32/
      cp -rsHf ${chosenGcc.cc.lib}/lib64/* lib64/
  
      # symlink 32-bit ld-linux.so
      ln -s ${staticUsrProfileTarget}/lib/32/ld-linux.so.2 lib/
  