Merge staging-next into staging

pkgs/development/ruby-modules/gem-config/default.nix

@@ -191,6 +191,10 @@ in
         [ darwin.apple_sdk.frameworks.CoreServices ];
   };
 
+  iconv = attrs: {
+    buildFlags = lib.optional stdenv.isDarwin "--with-iconv-dir=${libiconv}";
+  };
+
   # disable bundle install as it can't install anything in addition to what is
   # specified in pkgs/applications/misc/jekyll/Gemfile anyway. Also do chmod_R
   # to compensate for read-only files in site_template in nix store.
@@ -226,6 +230,12 @@ in
     '';
   };
 
+  metasploit-framework = attrs: {
+    preInstall = ''
+      export HOME=$TMPDIR
+    '';
+  };
+
   msgpack = attrs: {
     buildInputs = [ msgpack ];
   };