add duperemove: btrfs deduplication tool

pkgs/tools/filesystems/duperemove/default.nix

@@ -0,0 +1,24 @@
+{ lib, stdenv, fetchurl, libgcrypt, pkgconfig, glib, linuxHeaders }:
+
+stdenv.mkDerivation rec {
+  name = "duperemove-${version}";
+  version = "0.09.beta2";
+
+  src = fetchurl {
+    url = "https://github.com/markfasheh/duperemove/archive/v${version}.tar.gz";
+    sha256 = "0rn7lf9rjf4ypgfwms2y7b459rri4rfn809h6wx8xl9nbm5niil4";
+  };
+
+  buildInputs = [ libgcrypt pkgconfig glib linuxHeaders ];
+
+  makeFlags = [ "DESTDIR=$(out)" "PREFIX=" ];
+
+  meta = {
+    description = "A simple tool for finding duplicated extents and submitting them for deduplication";
+    homepage = https://github.com/markfasheh/duperemove;
+    license = lib.licenses.gpl2;
+
+    maintainers = [ lib.maintainers.bluescreen303 ];
+    platforms = lib.platforms.all;
+  };
+}

pkgs/top-level/all-packages.nix

@@ -682,6 +682,10 @@ let
 
   dlx = callPackage ../misc/emulators/dlx { };
 
+  duperemove = callPackage ../tools/filesystems/duperemove {
+    linuxHeaders = linuxHeaders_3_14;
+  };
+
   eggdrop = callPackage ../tools/networking/eggdrop { };
 
   enca = callPackage ../tools/text/enca { };