anchor.diff:        "PREFIX=$out"
         "UDEVLIBDIR=$out/lib/udev"
       )
  +    sed -i '/-static/d' Makefile
     '';
   
     preInstall = ''
  -    mkdir -p "$out/lib/udev/rules.d"
       mkdir -p "$out/bin"
       mkdir -p "$out/sbin"
       mkdir -p "$out/share/man/man8"
  +  '' + optionalString (channel == "stable") ''
  +    mkdir -p "$out/lib/udev/rules.d"
     '';
   
     meta = with stdenv.lib; {
  
positive.code: { stdenv
  , fetchFromGitHub
  
  , libnih
  , util-linux_lib
  
  , channel ? "stable"
  
negative.code:   buildInputs = [
      libnih
      util-linux_lib
    ] ++ optionals (channel == "dev") [
      keyutils
      libscrypt
      libsodium
    ];
  
    preBuild = ''
  