anchor.diff:  
     buildCommand =
       ''
  -      mkdir -p $out/bin $out/nix-support
  +      mkdir -p $out/bin $out/nix-support $man/nix-support
   
         wrap() {
           local dst="$1"
  
positive.code:       # Propagate the wrapped cc so that if you install the wrapper,
        # you get tools like gcov, the manpages, etc. as well (including
        # for binutils and Glibc).
        echo ${cc} ${cc.man or ""} ${binutils_bin} ${if libc == null then "" else libc_bin} > $out/nix-support/propagated-user-env-packages
  
        echo ${toString extraPackages} > $out/nix-support/propagated-native-build-inputs
      ''
  
negative.code:   inherit cc shell libc_bin libc_dev libc_lib binutils_bin coreutils_bin;
    gnugrep_bin = if nativeTools then "" else gnugrep;
  
    outputs = [ "out" "man" ];
  
    passthru = {
      inherit libc nativeTools nativeLibc nativePrefix isGNU isClang default_cxx_stdlib_compile
  