python.pkgs.biopython: move expression

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

@@ -0,0 +1,32 @@
+{ lib
+, buildPythonPackage
+, fetchPypi
+, numpy
+}:
+
+buildPythonPackage rec {
+  pname = "biopython";
+  version = "1.68";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "07qc7nz0k77y8hf8s18rscvibvm91zw0kkq7ylrhisf8vp8hkp6i";
+  };
+
+  propagatedBuildInputs = [ numpy ];
+  # Checks try to write to $HOME, which does not work with nix
+  doCheck = false;
+  meta = {
+    description = "Python library for bioinformatics";
+    longDescription = ''
+      Biopython is a set of freely available tools for biological computation
+      written in Python by an international team of developers. It is a
+      distributed collaborative effort to develop Python libraries and
+      applications which address the needs of current and future work in
+      bioinformatics.
+    '';
+    homepage = http://biopython.org/wiki/Documentation;
+    maintainers = with lib.maintainers; [ luispedro ];
+    license = lib.licenses.bsd3;
+  };
+}

pkgs/top-level/python-packages.nix

@@ -1239,33 +1239,7 @@ in {
     };
   };
 
-  biopython = buildPythonPackage rec {
+  biopython = callPackage ../development/python-modules/biopython { };
-    name = "biopython-${version}";
-    version = "1.68";
-
-    src = pkgs.fetchurl {
-      url = "mirror://pypi/b/biopython/${name}.tar.gz";
-      sha256 = "07qc7nz0k77y8hf8s18rscvibvm91zw0kkq7ylrhisf8vp8hkp6i";
-    };
-
-    propagatedBuildInputs = with self; [ numpy ];
-    # Checks try to write to $HOME, which does not work with nix
-    doCheck = false;
-    meta = {
-      description = "Python library for bioinformatics";
-
-      longDescription = ''
-        Biopython is a set of freely available tools for biological computation
-        written in Python by an international team of developers. It is a
-        distributed collaborative effort to develop Python libraries and
-        applications which address the needs of current and future work in
-        bioinformatics.
-      '';
-
-      homepage = http://biopython.org/wiki/Documentation;
-      maintainers = with maintainers; [ luispedro ];
-    };
-  };
 
   bedup = buildPythonPackage rec {
     version = "0.10.1";