diff --git a/pkgs/development/python-modules/black/default.nix b/pkgs/development/python-modules/black/default.nix
index bf82df4afa34..6f4e05767bb7 100644
--- a/pkgs/development/python-modules/black/default.nix
+++ b/pkgs/development/python-modules/black/default.nix
@@ -5,6 +5,7 @@
 , appdirs
 , attrs
 , click
+, colorama
 , dataclasses
 , mypy-extensions
 , pathspec
@@ -12,17 +13,20 @@
 , regex
 , toml
 , typed-ast
-, typing-extensions }:
+, typing-extensions
+, uvloop
+}:
+
 
 buildPythonPackage rec {
   pname = "black";
-  version = "21.5b1";
+  version = "21.6b0";
 
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1cdkrl5vw26iy7s23v2zpr39m6g5xsgxhfhagzzflgfbvdc56s93";
+    sha256 = "016f6bhnnnbcrrh3cvmpk77ww0nykv5n1qvgf8b3044dm14264yw";
   };
 
   nativeBuildInputs = [ setuptools-scm ];
@@ -31,7 +35,7 @@ buildPythonPackage rec {
   # Black starts a local server and needs to bind a local address.
   __darwinAllowLocalNetworking = true;
 
-  checkInputs =  [ pytestCheckHook parameterized ];
+  checkInputs = [ pytestCheckHook parameterized ];
 
   preCheck = ''
     export PATH="$PATH:$out/bin"
@@ -39,6 +43,9 @@ buildPythonPackage rec {
     # The top directory /build matches black's DEFAULT_EXCLUDE regex.
     # Make /build the project root for black tests to avoid excluding files.
     touch ../.git
+  '' + lib.optionalString stdenv.isDarwin ''
+    # Work around https://github.com/psf/black/issues/2105
+    export TMPDIR="/tmp"
   '';
 
   disabledTests = [
@@ -55,19 +62,21 @@ buildPythonPackage rec {
     appdirs
     attrs
     click
+    colorama
     mypy-extensions
     pathspec
     regex
     toml
-    typed-ast
-    typing-extensions
-  ] ++ lib.optional (pythonOlder "3.7") dataclasses;
+    typed-ast # required for tests and python2 extra
+    uvloop
+  ] ++ lib.optional (pythonOlder "3.7") dataclasses
+    ++ lib.optional (pythonOlder "3.8") typing-extensions;
 
   meta = with lib; {
     description = "The uncompromising Python code formatter";
-    homepage    = "https://github.com/psf/black";
-    changelog   = "https://github.com/psf/black/blob/${version}/CHANGES.md";
-    license     = licenses.mit;
+    homepage = "https://github.com/psf/black";
+    changelog = "https://github.com/psf/black/blob/${version}/CHANGES.md";
+    license = licenses.mit;
     maintainers = with maintainers; [ sveitser ];
   };
 }