data/fonts: simpler cleanups

pkgs/data/fonts/encode-sans/default.nix

@@ -1,22 +1,18 @@
-{ stdenv, fetchFromGitHub }:
+{ stdenv, fetchzip }:
 
-stdenv.mkDerivation rec {
+fetchzip rec {
   name = "encode-sans-1.002";
 
-  src = fetchFromGitHub {
-    owner = "impallari";
-    repo = "Encode-Sans";
-    rev = "11162b46892d20f55bd42a00b48cbf06b5871f75";
-    sha256 = "1v5k79qlsl6nggilmjw56axwwr2b3838x6vqch4lh0dck5ri9w2c";
-  };
+  url = https://github.com/impallari/Encode-Sans/archive/11162b46892d20f55bd42a00b48cbf06b5871f75.zip;
 
-  installPhase = ''
-    mkdir -p $out/share/fonts/truetype
-    mkdir -p $out/share/doc/${name}
-    cp -v *.ttf $out/share/fonts/truetype/
-    cp -v README.md FONTLOG.txt $out/share/doc/${name}
+  postFetch = ''
+    mkdir -p $out/share/{doc,fonts}
+    unzip -j $downloadedFile \*.ttf                    -d $out/share/fonts/truetype
+    unzip -j $downloadedFile \*README.md \*FONTLOG.txt -d "$out/share/doc/${name}"
   '';
 
+  sha256 = "16mx894zqlwrhnp4rflgayxhxppmsj6k7haxdngajhb30rlwf08p";
+
   meta = with stdenv.lib; {
     description = "A versatile sans serif font family";
     longDescription = ''