diff --git a/pkgs/development/python-modules/ufo2ft/default.nix b/pkgs/development/python-modules/ufo2ft/default.nix
index b1e5ea7905a0..5a87bfd42c2b 100644
--- a/pkgs/development/python-modules/ufo2ft/default.nix
+++ b/pkgs/development/python-modules/ufo2ft/default.nix
@@ -7,18 +7,19 @@
 , compreffor
 , booleanoperations
 , cffsubr
+, ufoLib2
 , pytestCheckHook
 }:
 
 buildPythonPackage rec {
   pname = "ufo2ft";
-  version = "2.27.0";
+  version = "2.28.0";
 
   format = "setuptools";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "r5bE4M/blt5TKzP43MpijwYY6ll3aasszmGksY5WTTE=";
+    sha256 = "sha256-pWHvjAvHNWlmJiQ75JRmFyrjYnzbJG7M8/DGoIWpEBk=";
   };
 
   patches = [
@@ -37,6 +38,7 @@ buildPythonPackage rec {
     compreffor
     booleanoperations
     cffsubr
+    ufoLib2
   ];
 
   checkInputs = [
diff --git a/pkgs/development/python-modules/ufo2ft/fonttools-cu2qu.patch b/pkgs/development/python-modules/ufo2ft/fonttools-cu2qu.patch
index 892cd4abeb30..56aba78b5b31 100644
--- a/pkgs/development/python-modules/ufo2ft/fonttools-cu2qu.patch
+++ b/pkgs/development/python-modules/ufo2ft/fonttools-cu2qu.patch
@@ -1,4 +1,4 @@
-From 0b3631e91c93d56460929f40850f7d8a39a71bde Mon Sep 17 00:00:00 2001
+From eb63747509b2c18793b95eb12cc0141277520798 Mon Sep 17 00:00:00 2001
 From: Simon Cozens <simon@simon-cozens.org>
 Date: Thu, 11 Feb 2021 09:43:41 +0000
 Subject: [PATCH 1/2] Rename cu2qu to fontTools.cu2qu
@@ -6,14 +6,13 @@ Subject: [PATCH 1/2] Rename cu2qu to fontTools.cu2qu
 ---
  Lib/ufo2ft/filters/cubicToQuadratic.py | 4 ++--
  Lib/ufo2ft/preProcessor.py             | 4 ++--
- requirements.txt                       | 1 -
  setup.py                               | 1 -
  tests/outlineCompiler_test.py          | 2 +-
  tests/preProcessor_test.py             | 2 +-
- 6 files changed, 6 insertions(+), 8 deletions(-)
+ 5 files changed, 6 insertions(+), 7 deletions(-)
 
 diff --git a/Lib/ufo2ft/filters/cubicToQuadratic.py b/Lib/ufo2ft/filters/cubicToQuadratic.py
-index 87d81b1f..4b77144f 100644
+index 87d81b1..4b77144 100644
 --- a/Lib/ufo2ft/filters/cubicToQuadratic.py
 +++ b/Lib/ufo2ft/filters/cubicToQuadratic.py
 @@ -1,7 +1,7 @@
@@ -27,44 +26,44 @@ index 87d81b1f..4b77144f 100644
  from ufo2ft.filters import BaseFilter
  from ufo2ft.fontInfoData import getAttrWithFallback
 diff --git a/Lib/ufo2ft/preProcessor.py b/Lib/ufo2ft/preProcessor.py
-index 05ac47dc..c796df2e 100644
+index e239152..9463aea 100644
 --- a/Lib/ufo2ft/preProcessor.py
 +++ b/Lib/ufo2ft/preProcessor.py
-@@ -217,7 +217,7 @@ def __init__(
-         layerNames=None,
+@@ -267,7 +267,7 @@ class TTFInterpolatablePreProcessor:
          skipExportGlyphs=None,
+         filters=None,
      ):
 -        from cu2qu.ufo import DEFAULT_MAX_ERR
 +        from fontTools.cu2qu.ufo import DEFAULT_MAX_ERR
  
          self.ufos = ufos
          self.inplace = inplace
-@@ -249,7 +249,7 @@ def __init__(
-             self.postFilters.append(post)
+@@ -304,7 +304,7 @@ class TTFInterpolatablePreProcessor:
+         self.postFilters = [[f for f in filters if not f.pre] for filters in filterses]
  
      def process(self):
 -        from cu2qu.ufo import fonts_to_quadratic
 +        from fontTools.cu2qu.ufo import fonts_to_quadratic
  
-         # first apply all custom pre-filters
-         for funcs, ufo, glyphSet in zip(self.preFilters, self.ufos, self.glyphSets):
+         needs_decomposition = set()
+ 
 diff --git a/setup.py b/setup.py
-index 175429af..eef39ee1 100644
+index d8d9982..a165ab1 100644
 --- a/setup.py
 +++ b/setup.py
-@@ -30,7 +30,6 @@
+@@ -30,7 +30,6 @@ setup(
      tests_require=["pytest>=2.8"],
      install_requires=[
-         "fonttools[ufo]>=4.28.5",
+         "fonttools[ufo]>=4.34.0",
 -        "cu2qu>=1.6.7",
          "cffsubr>=0.2.8",
          "booleanOperations>=0.9.0",
      ],
 diff --git a/tests/outlineCompiler_test.py b/tests/outlineCompiler_test.py
-index 74319184..e7b15a23 100644
+index b31319c..ee51920 100644
 --- a/tests/outlineCompiler_test.py
 +++ b/tests/outlineCompiler_test.py
-@@ -2,7 +2,7 @@
+@@ -2,7 +2,7 @@ import logging
  import os
  
  import pytest
@@ -74,10 +73,10 @@ index 74319184..e7b15a23 100644
  from fontTools.ttLib.tables._g_l_y_f import USE_MY_METRICS
  
 diff --git a/tests/preProcessor_test.py b/tests/preProcessor_test.py
-index 64196f92..87b23946 100644
+index 11196f8..bc32d55 100644
 --- a/tests/preProcessor_test.py
 +++ b/tests/preProcessor_test.py
-@@ -2,7 +2,7 @@
+@@ -2,7 +2,7 @@ import logging
  import os
  
  import pytest
@@ -86,8 +85,10 @@ index 64196f92..87b23946 100644
  from fontTools import designspaceLib
  
  import ufo2ft
+-- 
+2.36.1
 
-From 27c5af88ec2c3314618ecbf65104050a53508bb0 Mon Sep 17 00:00:00 2001
+From 58f3ab5e5db8090aba10fefd58ad8df4b507e7c3 Mon Sep 17 00:00:00 2001
 From: Simon Cozens <simon@simon-cozens.org>
 Date: Thu, 11 Feb 2021 09:49:28 +0000
 Subject: [PATCH 2/2] Sort the imports
@@ -98,7 +99,7 @@ Subject: [PATCH 2/2] Sort the imports
  2 files changed, 2 insertions(+), 2 deletions(-)
 
 diff --git a/Lib/ufo2ft/filters/cubicToQuadratic.py b/Lib/ufo2ft/filters/cubicToQuadratic.py
-index 4b77144f..5f28ea42 100644
+index 4b77144..5f28ea4 100644
 --- a/Lib/ufo2ft/filters/cubicToQuadratic.py
 +++ b/Lib/ufo2ft/filters/cubicToQuadratic.py
 @@ -1,7 +1,7 @@
@@ -111,10 +112,10 @@ index 4b77144f..5f28ea42 100644
  from ufo2ft.filters import BaseFilter
  from ufo2ft.fontInfoData import getAttrWithFallback
 diff --git a/tests/preProcessor_test.py b/tests/preProcessor_test.py
-index 87b23946..76ee495a 100644
+index bc32d55..41c579c 100644
 --- a/tests/preProcessor_test.py
 +++ b/tests/preProcessor_test.py
-@@ -2,8 +2,8 @@
+@@ -2,8 +2,8 @@ import logging
  import os
  
  import pytest
@@ -124,3 +125,6 @@ index 87b23946..76ee495a 100644
  
  import ufo2ft
  from ufo2ft.constants import (
+-- 
+2.36.1
+