data/fonts: simpler cleanups

pkgs/data/fonts/stix-two/default.nix

@@ -1,23 +1,19 @@
-{ stdenv, fetchurl, unzip }:
+{ stdenv, fetchzip }:
 
-stdenv.mkDerivation rec {
-  name = "stix-two-${version}";
+let
   version = "2.0.0";
+in fetchzip {
+  name = "stix-two-${version}";
 
-  src = fetchurl {
-    url = "mirror://sourceforge/stixfonts/Current%20Release/STIXv${version}.zip";
-    sha256 = "0f6rcg0p2dhnks523nywgkjk56bjajz3gnwsrap932674xxjkb3g";
-  };
+  url = "mirror://sourceforge/stixfonts/Current%20Release/STIXv${version}.zip";
 
-  buildInputs = [ unzip ];
-
-  phases = [ "unpackPhase" "installPhase" ];
-
-  installPhase = ''
-    mkdir -p $out/share/fonts/opentype
-    cp -v "Fonts/OTF/"*.otf $out/share/fonts/opentype
+  postFetch = ''
+    mkdir -p $out/share/fonts
+    unzip -j $downloadedFile \*.otf -d $out/share/fonts/opentype
   '';
 
+  sha256 = "19i30d2xjk52bjj7xva1hnlyh58yd5phas1njcc8ldcz87a1lhql";
+
   meta = with stdenv.lib; {
     homepage = http://www.stixfonts.org/;
     description = "Fonts for Scientific and Technical Information eXchange";