{ stdenv, fetchFromGitHub, valgrind }:

stdenv.mkDerivation rec {
  name = "lz4-${version}";
  version = "131";

  src = fetchFromGitHub {
    sha256 = "1bhvcq8fxxsqnpg5qa6k3nsyhq0nl0iarh08sqzclww27hlpyay2";
    rev = "r${version}";
    repo = "lz4";
    owner = "Cyan4973";
  };

  patches = [ ./install-on-freebsd.patch ] ;

  buildInputs = stdenv.lib.optional doCheck valgrind;

  # An ever-changing __DATE__ isn't very reproducible, so we must override it.
  # But rather than displaying "()" or 1970, let --version show useful info:
  NIX_CFLAGS_COMPILE = [
    ''-D__DATE__="${stdenv.cc.cc.name}"''
    "-Wno-builtin-macro-redefined"
  ];

  enableParallelBuilding = true;

  makeFlags = [ "PREFIX=$(out)" ];

  doCheck = false; # tests take a very long time
  checkTarget = "test";

  meta = with stdenv.lib; {
    description = "Extremely fast compression algorithm";
    longDescription = ''
      Very fast lossless compression algorithm, providing compression speed
      at 400 MB/s per core, with near-linear scalability for multi-threaded
      applications. It also features an extremely fast decoder, with speed in
      multiple GB/s per core, typically reaching RAM speed limits on
      multi-core systems.
    '';
    homepage = https://code.google.com/p/lz4/;
    license = with licenses; [ bsd2 gpl2Plus ];
    platforms = platforms.unix;
    maintainers = with maintainers; [ nckx ];
  };
}

{ stdenv, fetchFromGitHub, valgrind }:

stdenv.mkDerivation rec {
  name = "lz4-${version}";
  version = "131";

  src = fetchFromGitHub {
    sha256 = "1bhvcq8fxxsqnpg5qa6k3nsyhq0nl0iarh08sqzclww27hlpyay2";
    rev = "r${version}";
    repo = "lz4";
    owner = "Cyan4973";
  };

  buildInputs = stdenv.lib.optional doCheck valgrind;

  enableParallelBuilding = true;

  makeFlags = [ "PREFIX=$(out)" ];

  doCheck = false; # tests take a very long time
  checkTarget = "test";

  patches = [ ./install-on-freebsd.patch ] ;

  meta = with stdenv.lib; {
    description = "Extremely fast compression algorithm";
    longDescription = ''
      Very fast lossless compression algorithm, providing compression speed
      at 400 MB/s per core, with near-linear scalability for multi-threaded
      applications. It also features an extremely fast decoder, with speed in
      multiple GB/s per core, typically reaching RAM speed limits on
      multi-core systems.
    '';
    homepage = https://code.google.com/p/lz4/;
    license = with licenses; [ bsd2 gpl2Plus ];
    platforms = platforms.unix;
    maintainers = with maintainers; [ nckx ];
  };
}

Revert "lz4: be just a bit more reproducible"
Revert "lz4: be just a bit more reproducible"

This reverts commit efc359c23135ebccc2835b37513f01adf73e2dac,
as it is no longer needed.

See: https://github.com/NixOS/nixpkgs/commit/efc359c23135ebccc2835b37513f01adf73e2dac#commitcomment-15680107
