python.pkgs.backports_lzma: move expression

pkgs/development/python-modules/backports_lzma/default.nix

@@ -0,0 +1,32 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, isPy3k
+, lzma
+, python
+}:
+
+buildPythonPackage rec {
+  pname = "backports.lzma";
+  version = "0.0.3";
+
+  disabled = isPy3k;
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "bac58aec8d39ac3d22250840fb24830d0e4a0ef05ad8f3f09172dc0cc80cdbca";
+  };
+
+  buildInputs = [ lzma ];
+
+  # Needs the compiled module in $out
+  checkPhase = ''
+    PYTHONPATH=$out/${python.sitePackages}:$PYTHONPATH ${python.interpreter} -m unittest discover -s test
+  '';
+
+  meta = {
+    description = "Backport of Python 3.3's 'lzma' module for XZ/LZMA compressed files";
+    homepage = https://github.com/peterjc/backports.lzma;
+    license = lib.licenses.bsd3;
+  };
+}

pkgs/top-level/python-packages.nix

@@ -1038,23 +1038,7 @@ in {
     };
   };
 
-  backports_lzma = self.buildPythonPackage rec {
-    name = "backports.lzma-0.0.3";
-    disabled = isPy3k;
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/b/backports.lzma/${name}.tar.gz";
-      sha256 = "bac58aec8d39ac3d22250840fb24830d0e4a0ef05ad8f3f09172dc0cc80cdbca";
-    };
-
-    buildInputs = [ pkgs.lzma ];
-
-    meta = {
-      description = "Backport of Python 3.3's 'lzma' module for XZ/LZMA compressed files";
-      homepage = https://github.com/peterjc/backports.lzma;
-      license = licenses.bsd3;
-    };
-  };
+  backports_lzma = callPackage ../development/python-modules/backports_lzma { };
 
   backports_tempfile = callPackage ../development/python-modules/backports_tempfile { };