Package zerofree.

pkgs/tools/filesystems/zerofree/default.nix

···
+{ stdenv, fetchurl, e2fsprogs }:
+
+stdenv.mkDerivation rec {
+  name = "zerofree-1.0.3";
+
+  src = fetchurl {
+    url = "http://intgat.tigress.co.uk/rmy/uml/zerofree-1.0.3.tgz";
+    sha256 = "3acfda860be0f0ddcb5c982ff3b4475b1ee8cc35a90ae2a910e93261dbe0ccf6";
+  };
+
+  buildInputs = [ e2fsprogs ];
+
+  installPhase = ''
+    mkdir -p $out/bin
+    cp zerofree $out/bin
+'';
+
+  meta = {
+    homepage = http://intgat.tigress.co.uk/rmy/uml/index.html;
+    description = "zero free blocks from ext2, ext3 and ext4 file-systems";
+    platforms = stdenv.lib.platforms.linux;
+    maintainers = [ stdenv.lib.maintainers.theuni ];
+  };
+}

pkgs/top-level/all-packages.nix

···
 
   zerotierone = callPackage ../tools/networking/zerotierone { };
 
+  zerofree = callPackage ../tools/filesystems/zerofree { };
+
   zfstools = callPackage ../tools/filesystems/zfstools { };
 
   zile = callPackage ../applications/editors/zile { };