anchor.diff: -{ stdenv, fetchurl, sbclBootstrap, sbclBootstrapHost ? "${sbclBootstrap}/bin/sbcl --disable-debugger --no-userinit --no-sysinit", which }:
  +{ stdenv, fetchurl, sbclBootstrap, sbclBootstrapHost ? "${sbclBootstrap}/bin/sbcl --disable-debugger --no-userinit --no-sysinit" }:
   
   stdenv.mkDerivation rec {
     name    = "sbcl-${version}";
  
positive.code:     url    = "mirror://sourceforge/project/sbcl/sbcl/${version}/${name}-source.tar.bz2";
      sha256 = "1cwrmvbx8m7n7wkcm16yz7qwx221giz7jskzkvy42pj919may36n";
    };
  
    buildInputs = [ which ];
  
    patchPhase = ''
      echo '"${version}.nixos"' > version.lisp-expr
  
negative.code:       '/date defaulted-source/i(or (and (= 2208988801 (file-write-date defaulted-source-truename)) (= 2208988801 (file-write-date defaulted-fasl-truename)))'
  
      # Fix software version retrieval
      sed -e "s@/bin/uname@$(command -v uname)@g" -i src/code/*-os.lisp
  
      # Fix the tests
      sed -e '/deftest pwent/inil' -i contrib/sb-posix/posix-tests.lisp
  