Tidy nckx-maintained packages

- Use fetchFromGitHub when possible
- Build in parallel if supported

pkgs/development/libraries/libcli/default.nix

@@ -1,12 +1,14 @@
-{ stdenv, fetchurl }:
+{ stdenv, fetchFromGitHub }:
 
+let version = "1.9.7"; in
 stdenv.mkDerivation rec {
-  version = "1.9.7";
   name = "libcli-${version}";
 
-  src = fetchurl {
-    url = "https://github.com/dparrish/libcli/archive/v${version}.tar.gz";
-    sha256 = "0v4867jbach5zd1nq0sspq5q95vvbpnljzm2yf64k8a4w2vadpbx";
+  src = fetchFromGitHub {
+    sha256 = "08pmjhqkwldhmcwjhi2l27slf1fk6nxxfaihnk2637pqkycy8z0c";
+    rev = "v${version}";
+    repo = "libcli";
+    owner = "dparrish";
   };
 
   enableParallelBuilding = true;

pkgs/tools/compression/lz4/default.nix

@@ -1,12 +1,14 @@
-{ stdenv, fetchurl, valgrind }:
+{ stdenv, fetchFromGitHub, valgrind }:
 
+let version = "128"; in
 stdenv.mkDerivation rec {
-  version = "128";
   name = "lz4-${version}";
 
-  src = fetchurl {
-    url = "https://github.com/Cyan4973/lz4/archive/r${version}.tar.gz";
-    sha256 = "1lf7a0gqm2q7p1qs28lmajmls3pwfk2p0w3hljjlmshbkndaj26b";
+  src = fetchFromGitHub {
+    sha256 = "00jrnic2jddj81av8jjipf4rdkx6x6cdf8zpsz3mp5kbmqzd0h9a";
+    rev = "r${version}";
+    repo = "lz4";
+    owner = "Cyan4973";
   };
 
   # valgrind is required only by `make test`

pkgs/tools/filesystems/duff/default.nix

@@ -1,12 +1,14 @@
-{ stdenv, fetchurl, autoreconfHook, gettext }:
+{ stdenv, fetchFromGitHub, autoreconfHook, gettext }:
 
+let version = "0.5.2"; in
 stdenv.mkDerivation rec {
   name = "duff-${version}";
-  version = "0.5.2";
 
-  src = fetchurl {
-    url = "https://github.com/elmindreda/duff/archive/${version}.tar.gz";
-    sha256 = "149dd80f9758085ed199c37aa32ad869409fa5e2c8da8a51294bd64ca886e058";
+  src = fetchFromGitHub {
+    sha256 = "0yfm910wjj6z0f0cg68x59ykf4ql5m49apzy8sra00f8kv4lpn53";
+    rev = version;
+    repo = "duff";
+    owner = "elmindreda";
   };
 
   buildInputs = [ autoreconfHook gettext ];
@@ -25,6 +27,8 @@ stdenv.mkDerivation rec {
       -i configure.ac
   '';
 
+  enableParallelBuilding = true;
+
   meta = with stdenv.lib; {
     description = "Quickly find duplicate files.";
     homepage = http://duff.dreda.org/;

pkgs/tools/filesystems/mp3fs/default.nix

@@ -1,7 +1,7 @@
 { stdenv, fetchurl, flac, fuse, lame, libid3tag, pkgconfig }:
 
+let version = "0.91"; in
 stdenv.mkDerivation rec {
-  version = "0.91";
   name = "mp3fs-${version}";
 
   src = fetchurl {

pkgs/tools/security/eid-mw/default.nix

@@ -14,6 +14,8 @@ stdenv.mkDerivation rec {
 
   buildInputs = [ autoreconfHook gtk2 pcsclite pkgconfig ];
 
+  enableParallelBuilding = true;
+
   doCheck = true;
 
   postInstall = ''