pythonPackages.pyfftw : move to separate expression

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

···
+{ stdenv, buildPythonPackage, fetchPypi
+, fftw, fftwFloat, fftwLongDouble, numpy, scipy }:
+
+buildPythonPackage rec {
+  version = "0.10.4";
+  pname = "pyFFTW";
+  name = "${pname}-${version}";
+
+  src = fetchPypi {
+    inherit pname version;
+    sha256 = "739b436b7c0aeddf99a48749380260364d2dc027cf1d5f63dafb5f50068ede1a";
+  };
+
+  buildInputs = [ fftw fftwFloat fftwLongDouble];
+
+  propagatedBuildInputs = [ numpy scipy ];
+
+  # Tests cannot import pyfftw. pyfftw works fine though.
+  doCheck = false;
+
+  preConfigure = ''
+    export LDFLAGS="-L${fftw.out}/lib -L${fftwFloat.out}/lib -L${fftwLongDouble.out}/lib"
+    export CFLAGS="-I${fftw.dev}/include -I${fftwFloat.dev}/include -I${fftwLongDouble.dev}/include"
+  '';
+  #+ optionalString isDarwin ''
+  #  export DYLD_LIBRARY_PATH="${pkgs.fftw.out}/lib"
+  #'';
+
+  meta = with stdenv.lib; {
+    description = "A pythonic wrapper around FFTW, the FFT library, presenting a unified interface for all the supported transforms";
+    homepage = http://hgomersall.github.com/pyFFTW/;
+    license = with licenses; [ bsd2 bsd3 ];
+    maintainers = with maintainers; [ fridh ];
+  };
+}

pkgs/top-level/python-packages.nix

···
 
   pyfeed = callPackage ../development/python-modules/pyfeed { };
 
-    meta = {
-      description = "A pythonic wrapper around FFTW, the FFT library, presenting a unified interface for all the supported transforms";
-      homepage = http://hgomersall.github.com/pyFFTW/;
-      license = with licenses; [ bsd2 bsd3 ];
-      maintainers = with maintainers; [ fridh ];
-    };
-  };
-
-  pyfiglet = buildPythonPackage rec {
-    name = "pyfiglet-${version}";
-    version = "0.7.5";
-
-    src = pkgs.fetchurl {
-      url    = "mirror://pypi/p/pyfiglet/${name}.tar.gz";
-      sha256 = "04jy4182hn5xfs6jf432gxclfj1rhssd7bsf0b4gymrjzkhr8qa4";
-    };
-
-    doCheck = false;
+  pyfftw = callPackage ../development/python-modules/pyfftw { };
 
     meta = {
       description = "FIGlet in pure Python";