anchor.diff:    };
   
     staticUsrProfileMulti = nixpkgs.buildEnv {
  -    name = "system-profile-multi";
  -    paths = multiPaths;
  +    name = "${name}-usr-multi";
  +    paths = baseMultiPkgs ++ multiPaths;
       extraOutputsToInstall = [ "lib" "out" ] ++ extraOutputsToInstall;
       ignoreCollisions = true;
     };
  
positive.code:     # copy content of targetPaths (64bit libs)
      cp -rsHf ${staticUsrProfileTarget}/lib/* lib64/ && chmod u+w -R lib64/
  
      # most 64bit only libs put their stuff into /lib
      # some pkgs (like gcc_multi) put 32bit libs into /lib and 64bit libs into /lib64
      # by overwriting these we will hopefully catch all these cases
      # in the end /lib32 should only contain 32bit and /lib64 only 64bit libs
      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/
    '';
  
    setupLibDirs = if isTargetBuild then setupLibDirs_target
  
negative.code: 
    # list of packages which are installed for both x86 and x86_64 on x86_64
    # systems
    multiPaths = multiPkgs nixpkgs_i686;
  
    # base packages of the chroot
    # these match the host's architecture, glibc_multi is used for multilib
    # builds.
    basePkgs = with nixpkgs;
      [ (if isMultiBuild then glibc_multi else glibc)
        gcc.cc.lib bashInteractive coreutils less shadow su
        gawk diffutils findutils gnused gnugrep
        gnutar gzip bzip2 xz glibcLocales
      ];
    baseMultiPkgs = with nixpkgs_i686;
      [ gcc.cc.lib
      ];
  
    etcProfile = nixpkgs.writeText "profile" ''
  