gnomeExtensions.dash-to-dock: init at version v57

I needed this extensions and wanted to share it with everyone.
I also created the new group called pkgs.gnomeExtensions.

pkgs/desktops/gnome-3/extensions/dash-to-dock/default.nix

@@ -0,0 +1,26 @@
+{ stdenv, fetchFromGitHub, glib, gettext }:
+
+stdenv.mkDerivation rec {
+  name = "gnome-shell-dash-to-dock-${version}";
+  version = "v57";
+
+  src = fetchFromGitHub {
+    owner = "micheleg";
+    repo = "dash-to-dock";
+    rev = "97f6a0bb95b9f87d7a34a074c9b3624b65111794";
+    sha256 = "0b9i89hpn9k63zcrbl4bhs7qfb70wh09870fwv2ik7hajm64kynn";
+  };
+
+  nativeBuildInputs = [
+    glib gettext
+  ];
+
+  patches = [ ./fix-paths.patch ];
+
+  meta = with stdenv.lib; {
+    description = "A dock for the Gnome Shell";
+    license = licenses.gpl2;
+    maintainers = with maintainers; [ eperuffo ];
+    homepage = https://micheleg.github.io/dash-to-dock/;
+  };
+}

pkgs/desktops/gnome-3/extensions/dash-to-dock/fix-paths.patch

@@ -0,0 +1,17 @@
+diff --git a/Makefile b/Makefile
+index fd29ef8..ec0376a 100644
+--- a/Makefile
++++ b/Makefile
+@@ -6,11 +6,7 @@ EXTRA_MODULES = convenience.js dash.js docking.js appIcons.js windowPreview.js i
+ EXTRA_MEDIA = logo.svg
+ TOLOCALIZE =  prefs.js
+ MSGSRC = $(wildcard po/*.po)
+-ifeq ($(strip $(DESTDIR)),)
+-	INSTALLBASE = $(HOME)/.local/share/gnome-shell/extensions
+-else
+-	INSTALLBASE = $(DESTDIR)/usr/share/gnome-shell/extensions
+-endif
++INSTALLBASE = $(out)/share/gnome-shell/extensions
+ INSTALLNAME = dash-to-dock@micxgx.gmail.com
+
+ # The command line passed variable VERSION is used to set the version string

pkgs/top-level/all-packages.nix

@@ -17144,6 +17144,10 @@ with pkgs;
 
   gnome3 = gnome3_22;
 
+  gnomeExtensions = {
+    dash-to-dock = callPackage ../desktops/gnome-3/extensions/dash-to-dock { };
+  };
+
   hsetroot = callPackage ../tools/X11/hsetroot { };
 
   kakasi = callPackage ../tools/text/kakasi { };