anchor.diff:      sha256 = "1b165zi7jrrlz5wmyy3b34lcs3dl4g0dymfb0qxwdnimylcrsbzk";
     };
   
  +  # FIXME: -dev depends on -doc
     outputs = [ "dev" "out" "doc" ];
   
     buildInputs = [ pkgconfig perl apr aprutil pcre zlib ] ++
  
positive.code:   postInstall = ''
      mkdir -p $doc/share/doc/httpd
      mv $out/manual $doc/share/doc/httpd
      mkdir -p $out/share # FIXME, hack
    '';
  
    passthru = {
  
negative.code: 
    # Required for ‘pthread_cancel’.
    NIX_LDFLAGS = (if stdenv.isDarwin then "" else "-lgcc_s");
  
    patchPhase = ''
      sed -i config.layout -e "s|installbuilddir:.*|installbuilddir: $dev/share/build|"
    '';
  
    configureFlags = ''
      --with-z=${zlib}
  