ioping: reimplement using mkDerivation

Also
- set platform unix (upstream claims to support bsd and sun as well)
- fetch source from GitHub

pkgs/tools/system/ioping/default.nix

@@ -1,47 +1,20 @@
-x@{builderDefsPackage
-  , ...}:
-builderDefsPackage
-(a :  
-let 
-  helperArgNames = ["stdenv" "fetchurl" "builderDefsPackage"] ++ 
-    [];
+{ stdenv, fetchurl }:
 
-  buildInputs = map (n: builtins.getAttr n x)
-    (builtins.attrNames (builtins.removeAttrs x helperArgNames));
-  sourceInfo = rec {
-    baseName="ioping";
-    version = "0.9";
-    name="${baseName}-${version}";
-    url="https://docs.google.com/uc?id=0B_PlDc2qaehFWWtLZ3Z3N1ltdm8&export=download";
-  };
-in
-rec {
-  src = a.fetchurl {
-    url = sourceInfo.url;
-    name = "${sourceInfo.name}.tar.gz";
+stdenv.mkDerivation rec {
+  name = "ioping-${version}";
+  version = "0.9";
+  src = fetchurl {
+    url = "https://github.com/koct9i/ioping/releases/download/v${version}/${name}.tar.gz";
     sha256 = "0pbp7b3304y9yyv2w41l3898h5q8w77hnnnq1vz8qz4qfl4467lm";
   };
 
-  inherit (sourceInfo) name version;
-  inherit buildInputs;
+  makeFlags = "PREFIX=$(out)";
 
-  /* doConfigure should be removed if not needed */
-  phaseNames = ["doMakeInstall"];
-  makeFlags = [
-    ''PREFIX="$out"''
-  ];
-      
-  meta = {
-    description = "Filesystem IO delay time measurer";
-    maintainers = with a.lib.maintainers;
-    [
-      raskin
-    ];
-    platforms = with a.lib.platforms;
-      linux;
-    license = a.lib.licenses.gpl3Plus;
-    homepage = "http://code.google.com/p/ioping/";
-    inherit version;
+  meta = with stdenv.lib; {
+    description = "Disk I/O latency measuring tool";
+    maintainers = with maintainers; [ raskin ];
+    platforms = with platforms; unix;
+    license = licenses.gpl3Plus;
+    homepage = https://github.com/koct9i/ioping;
   };
-}) x
-
+}