diff --git a/pkgs/development/libraries/irrlicht/common.nix b/pkgs/development/libraries/irrlicht/common.nix
new file mode 100644
index 000000000000..f330c30fda11
--- /dev/null
+++ b/pkgs/development/libraries/irrlicht/common.nix
@@ -0,0 +1,11 @@
+{ fetchzip }:
+
+rec {
+  pname = "irrlicht";
+  version = "1.8.4";
+
+  src = fetchzip {
+    url = "mirror://sourceforge/irrlicht/${pname}-${version}.zip";
+    sha256 = "02sq067fn4xpf0lcyb4vqxmm43qg2nxx770bgrl799yymqbvih5f";
+  };
+}
diff --git a/pkgs/development/libraries/irrlicht/default.nix b/pkgs/development/libraries/irrlicht/default.nix
index 65b3ce028afe..f411ecdeea65 100644
--- a/pkgs/development/libraries/irrlicht/default.nix
+++ b/pkgs/development/libraries/irrlicht/default.nix
@@ -1,14 +1,14 @@
 { stdenv, fetchzip, libGLU, libGL, unzip, libXrandr, libX11, libXxf86vm }:
 
+let
+  common = import ./common.nix { inherit fetchzip; };
+in
 
 stdenv.mkDerivation rec {
-  pname = "irrlicht";
-  version = "1.8.4";
+  pname = common.pname;
+  version = common.version;
 
-  src = fetchzip {
-    url = "mirror://sourceforge/irrlicht/${pname}-${version}.zip";
-    sha256 = "02sq067fn4xpf0lcyb4vqxmm43qg2nxx770bgrl799yymqbvih5f";
-  };
+  src = common.src;
 
   preConfigure = ''
     cd source/Irrlicht
diff --git a/pkgs/development/libraries/irrlicht/mac.nix b/pkgs/development/libraries/irrlicht/mac.nix
index 00300d87582d..beead1f9b857 100644
--- a/pkgs/development/libraries/irrlicht/mac.nix
+++ b/pkgs/development/libraries/irrlicht/mac.nix
@@ -1,19 +1,12 @@
 { stdenv, fetchzip, libGLU, libGL, unzip, fetchFromGitHub, cmake, Cocoa, OpenGL, IOKit }:
 
 let
-  version = "1.8.4";
-
-  irrlichtZip = fetchzip {
-    name = "irrlichtZip";
-    url = "mirror://sourceforge/irrlicht/irrlicht-${version}.zip";
-    sha256 = "02sq067fn4xpf0lcyb4vqxmm43qg2nxx770bgrl799yymqbvih5f";
-  };
-
+  common = import ./common.nix { inherit fetchzip; };
 in
 
 stdenv.mkDerivation rec {
   pname = "irrlicht-mac";
-  inherit version;
+  version = common.version;
 
   src = fetchFromGitHub {
 		owner = "quiark";
@@ -23,7 +16,7 @@ stdenv.mkDerivation rec {
   };
 
   postUnpack = ''
-    cp -r ${irrlichtZip}/* $sourceRoot/
+    cp -r ${common.src}/* $sourceRoot/
     chmod -R 777 $sourceRoot
 	'';
 
diff --git a/pkgs/development/libraries/leveldb/default.nix b/pkgs/development/libraries/leveldb/default.nix
index 49487fc1e5f8..62abc1bd68ca 100644
--- a/pkgs/development/libraries/leveldb/default.nix
+++ b/pkgs/development/libraries/leveldb/default.nix
@@ -1,4 +1,4 @@
-{ stdenv, fetchFromGitHub }:
+{ stdenv, fetchFromGitHub, fixDarwinDylibNames }:
 
 stdenv.mkDerivation rec {
   pname = "leveldb";
@@ -11,16 +11,14 @@ stdenv.mkDerivation rec {
     sha256 = "01kxga1hv4wp94agx5vl3ybxfw5klqrdsrb6p6ywvnjmjxm8322y";
   };
 
+  nativeBuildInputs = []
+    ++ stdenv.lib.optional stdenv.isDarwin [ fixDarwinDylibNames ];
+
   buildPhase = ''
     make all
   '';
 
-  installPhase = (stdenv.lib.optionalString stdenv.isDarwin ''
-    for file in out-shared/*.dylib.*.*; do
-      install_name_tool -id $out/lib/$(basename $file) $file
-    done
-  '') + # XXX consider removing above after transition to cmake in the next release
-  "
+  installPhase = "
     mkdir -p $out/{bin,lib,include}
 
     cp -r include $out
diff --git a/pkgs/games/minetest/default.nix b/pkgs/games/minetest/default.nix
index 77a88a2319f2..03c1cb5cc4ab 100644
--- a/pkgs/games/minetest/default.nix
+++ b/pkgs/games/minetest/default.nix
@@ -40,8 +40,6 @@ let
       "-DOpenGL_GL_PREFERENCE=GLVND"
     ];
     
-    patches = [ ./fix_wordsize_confusion.patch ];
-
     NIX_CFLAGS_COMPILE = "-DluaL_reg=luaL_Reg"; # needed since luajit-2.1.0-beta3
 
     nativeBuildInputs = [ cmake doxygen graphviz ];