diff --git a/pkgs/development/python-modules/pyblock/default.nix b/pkgs/development/python-modules/pyblock/default.nix
new file mode 100644
index 00000000000..1be0ad1d4c7
--- /dev/null
+++ b/pkgs/development/python-modules/pyblock/default.nix
@@ -0,0 +1,38 @@
+{ stdenv
+, fetchurl
+, python
+, pkgs
+, isPy3k
+}:
+
+stdenv.mkDerivation rec {
+  name = "pyblock-${version}";
+  version = "0.53";
+  md5_path = "f6d33a8362dee358517d0a9e2ebdd044";
+
+  src = pkgs.fetchurl rec {
+    url = "http://src.fedoraproject.org/repo/pkgs/python-pyblock/"
+        + "${name}.tar.bz2/${md5_path}/${name}.tar.bz2";
+    sha256 = "f6cef88969300a6564498557eeea1d8da58acceae238077852ff261a2cb1d815";
+  };
+
+  postPatch = ''
+    sed -i -e 's|/usr/include/python|${python}/include/python|' \
+           -e 's/-Werror *//' -e 's|/usr/|'"$out"'/|' Makefile
+  '';
+
+  buildInputs = [ python pkgs.lvm2 pkgs.dmraid ];
+
+  makeFlags = [
+    "USESELINUX=0"
+    "SITELIB=$(out)/${python.sitePackages}"
+  ];
+
+  meta = with stdenv.lib; {
+    homepage = https://www.centos.org/docs/5/html/5.4/Technical_Notes/python-pyblock.html;
+    description = "Interface for working with block devices";
+    license = licenses.gpl2Plus;
+    broken = isPy3k; # doesn't build on python 3, 2018-04-11
+  };
+
+}
diff --git a/pkgs/top-level/python-packages.nix b/pkgs/top-level/python-packages.nix
index 9a1a35239a6..92ff9255635 100644
--- a/pkgs/top-level/python-packages.nix
+++ b/pkgs/top-level/python-packages.nix
@@ -3273,35 +3273,7 @@ in {
 
   pybfd = callPackage ../development/python-modules/pybfd { };
 
-  pyblock = stdenv.mkDerivation rec {
-    name = "pyblock-${version}";
-    version = "0.53";
-    md5_path = "f6d33a8362dee358517d0a9e2ebdd044";
-
-    src = pkgs.fetchurl rec {
-      url = "http://src.fedoraproject.org/repo/pkgs/python-pyblock/"
-          + "${name}.tar.bz2/${md5_path}/${name}.tar.bz2";
-      sha256 = "f6cef88969300a6564498557eeea1d8da58acceae238077852ff261a2cb1d815";
-    };
-
-    postPatch = ''
-      sed -i -e 's|/usr/include/python|${python}/include/python|' \
-             -e 's/-Werror *//' -e 's|/usr/|'"$out"'/|' Makefile
-    '';
-
-    buildInputs = with self; [ python pkgs.lvm2 pkgs.dmraid ];
-
-    makeFlags = [
-      "USESELINUX=0"
-      "SITELIB=$(out)/${python.sitePackages}"
-    ];
-
-    meta = {
-      description = "Interface for working with block devices";
-      license = licenses.gpl2Plus;
-      broken = isPy3k; # doesn't build on python 3, 2018-04-11
-    };
-  };
+  pyblock = callPackage ../development/python-modules/pyblock { };
 
   pybcrypt = buildPythonPackage rec {
     pname = "pybcrypt";