{ stdenv, fetchurl, attr, acl, zlib, libuuid, e2fsprogs, lzo }:

stdenv.mkDerivation rec {
  name = "btrfs-progs-v3.12";

  src = fetchurl {
    url = "mirror://kernel/linux/kernel/people/mason/btrfs-progs/${name}.tar.xz";
    sha256 = "1pwcjf9jqdiy8445r1xkazqa07xmapnn0ylyz7yzphci3ib66zh9";
  };

  buildInputs = [ attr acl zlib libuuid e2fsprogs lzo ];

  # for btrfs to get the rpath to libgcc_s, needed for pthread_cancel to work
  NIX_CFLAGS_LINK = "-lgcc_s";

  makeFlags = "prefix=$(out)";

  meta = {
    description = "Utilities for the btrfs filesystem";
    homepage = https://btrfs.wiki.kernel.org/;
    maintainers = [ stdenv.lib.maintainers.raskin ];
    platforms = stdenv.lib.platforms.linux;
  };
}

{ stdenv, fetchurl, attr, acl, zlib, libuuid, e2fsprogs, lzo }:

stdenv.mkDerivation rec {
  name = "btrfs-progs-3.12";

  src = fetchurl {
    url = "mirror://kernel/linux/kernel/people/mason/btrfs-progs/${name}.tar.xz";
    sha256 = "1pwcjf9jqdiy8445r1xkazqa07xmapnn0ylyz7yzphci3ib66zh9";
  };

  buildInputs = [ attr acl zlib libuuid e2fsprogs lzo ];

  # for btrfs to get the rpath to libgcc_s, needed for pthread_cancel to work
  NIX_CFLAGS_LINK = "-lgcc_s";

  makeFlags = "prefix=$(out)";

  meta = {
    description = "Utilities for the btrfs filesystem";
    homepage = https://btrfs.wiki.kernel.org/;
    maintainers = [ stdenv.lib.maintainers.raskin ];
    platforms = stdenv.lib.platforms.linux;
  };
}

Fix btrfsprogs so nix detects the version
Fix btrfsprogs so nix detects the version

Currently, btrfsprogs is misdetected by nix such that it requires
specifying btrfs-progs-v3.12 for install instead of just btrfs-progs.
This patch removes the v so that it now reads btrfs-progs-3.12 and is
properly detected by nix.
