pnfft: 1.0.7-alpha -> 1.0.7-alpha-unstable-2018-06-04, switch to GitHub (#402373)

pkgs/by-name/pn/pnfft/package.nix

@@ -1,6 +1,6 @@
 {
   autoreconfHook,
-  fetchurl,
+  fetchFromGitHub,
   fftwMpi,
   gsl,
   lib,
@@ -22,11 +22,13 @@ let
 in
 stdenv.mkDerivation (finalAttrs: {
   pname = "pnfft-${precision}";
-  version = "1.0.7-alpha";
+  version = "1.0.7-alpha-unstable-2018-06-04";
 
-  src = fetchurl {
-    url = "https://www-user.tu-chemnitz.de/~potts/workgroup/pippig/software/pnfft-${finalAttrs.version}.tar.gz";
-    hash = "sha256-/aVY/1fuMRl1Q2O7bmc5M4aA0taGD+fcQgCdhVYr1no=";
+  src = fetchFromGitHub {
+    owner = "mpip";
+    repo = "pnfft";
+    rev = "a0bb24b8fa8af59c9e599b1cc3914586636d9125";
+    hash = "sha256-Cgusm/zWCLy//3qh/YAXjCZGl+QOnycUjUCQsd1HxvQ=";
   };
 
   outputs = [
@@ -49,6 +51,8 @@ stdenv.mkDerivation (finalAttrs: {
 
   propagatedBuildInputs = [ pfft' ];
 
+  enableParallelBuilding = true;
+
   doCheck = true;
 
   meta = {